| ENDEAVOUR INTERNATIONAL CORP      Item 1A Risk Factors     The following material risk factors, among others, may affect our financial     condition and results of operations | 
    
      | 8       _________________________________________________________________    [46]Table of Contents                        Endeavour International Corporation       We have had operating losses to date and do not expect to be profitable in     the foreseeable future | 
    
      | We have been operating at a loss each year since our inception, and we     expect to continue to incur substantial losses for the foreseeable future | 
    
      | Net loss applicable to common stockholders for the years ended December 31,     2005, 2004 and 2003 was dlra31dtta5 million, dlra23dtta8 million and dlra41dtta2 million,     respectively | 
    
      | We expect to incur substantial expenditures in connection with     our oil and gas exploration activities which will be in excess of operating     cash flows | 
    
      | If we are unable to generate additional financing, we will not be able to     adequately fund our existing development and exploration projects, acquire     additional oil and gas interests, or maintain our rights in such projects | 
    
      | We may not have an adequate amount of financial resources to adequately fund     our development and exploration projects on a long-term basis | 
    
      | In the past,     we have relied on the sale of our debt and equity securities to fund the     acquisition, exploration and development of our petroleum properties | 
    
      | We     will need to raise additional capital to continue funding these projects and     to have the ability to fund additional projects | 
    
      | We cannot assure you that     additional funding will be available to us for exploration and development     of our projects or to fulfill our obligations under any agreements | 
    
      | We also     cannot assure you that we will be able to generate sufficient operating cash     flow or obtain adequate financing in the future or that the terms of any     such  financing will be favorable | 
    
      | Failure to generate such additional     operating cash flow or obtain such additional financing could result in     delay, postponement or cancellation of further exploration and development     of our projects or the loss of our interest in our prospects | 
    
      | Acquiring interests in properties for oil and natural gas exploration is     speculative in nature and may not ever result in operating revenues or     profits | 
    
      | We  cannot  assure you that we will discover oil and gas in commercial     quantities in our current properties or properties we may acquire in the     future | 
    
      | Our success depends upon our ability to acquire working and revenue     interests in properties upon which oil and gas reserves ultimately are     discovered | 
    
      | We  expect  to derive the cash flow necessary to fund our     operations from the oil and gas produced from our producing properties     and/or the sale of our properties, but there is no assurance we will be able     to do so | 
    
      | If we are unable to identify additional oil and gas prospects in which we     can  acquire an interest at an affordable price, we may not be able to     sustain our growth rate and our ability to spread risk will be impaired | 
    
      | One element of our strategy is to continue to grow and spread risk through     selected acquisitions of additional ownership interests in oil and gas     prospects; provided, however:       •   we may not be able to identify additional desirable oil and gas     prospects and acquire leasehold or other ownership interests in such     prospects at a desirable price;         •   any of our completed, currently planned, or future acquisitions of     ownership interests in oil and gas prospects may not include prospects that     contain proven oil or gas reserves;         •   we may not have the ability to develop prospects that contain proven     oil or gas reserves to the point of commercial production;                                         9       _________________________________________________________________    [47]Table of Contents                        Endeavour International Corporation         •   we may not have the financial ability to consummate additional     acquisitions of ownership interests in oil and gas prospects or to develop     the prospects that we acquire to the point of production; and         •   we may not be able to consummate additional acquisitions on terms     favorable to us or at all | 
    
      | We may not be able to replace production with new reserves | 
    
      | Our future oil and gas production is highly dependent upon our level of     success in finding or acquiring additional reserves | 
    
      | In general, the volume     of production from oil and gas properties declines as reserves are depleted | 
    
      | The decline rates depend on reservoir characteristics | 
    
      | Our reserves will     decline  unless  we acquire properties with proved reserves or conduct     successful development and exploration drilling activities | 
    
      | Our  recent  growth  is due in large part to acquisitions of producing     properties | 
    
      | The successful acquisition of producing properties requires an     assessment of a number of factors, some of which are beyond our control | 
    
      | These factors include:       •   our estimates of recoverable reserves;         •   future oil and gas prices;         •   operating costs; and         •   potential environmental and other liabilities | 
    
      | These assessments are inexact and their accuracy is inherently uncertain | 
    
      | In     connection  with  such assessments, we perform a review of the subject     properties consistent with industry practices | 
    
      | However, our review will not     reveal all existing or potential problems | 
    
      | In addition, our review may not     permit us to become sufficiently familiar with the properties to fully     assess their deficiencies and capabilities | 
    
      | We cannot assure you that we     will  be  able  to acquire properties at acceptable prices because the     competition for producing oil and gas properties is intense and many of our     competitors  have financial and other resources that are substantially     greater than those available to us | 
    
      | Market fluctuations in the prices of oil and gas could adversely affect the     price at which we can sell oil or gas discovered on our properties | 
    
      | In recent decades, there have been periods of both worldwide over-production     and  underproduction of hydrocarbons and periods of both increased and     relaxed energy conservation efforts | 
    
      | These conditions have resulted in     periods  of  excess  supply of, and reduced demand for, crude oil on a     worldwide basis and for natural gas on a regional basis | 
    
      | These periods     historically have been followed by periods of short supply of, and increased     demand for, crude oil and, to a lesser extent, natural gas | 
    
      | The excess or     short supply of oil and gas has placed pressures on prices and has resulted     in dramatic price fluctuations, even during relatively short periods of     seasonal market demand | 
    
      | We cannot predict with any degree of certainty     future oil and gas prices | 
    
      | Changes in oil and gas prices significantly     affect our revenues, operating results, profitability and the value of our     oil and gas reserves | 
    
      | Lower prices may reduce the amount of oil and gas that     we can produce economically | 
    
      | In an attempt to reduce our price risk, we     periodically enter into hedging transactions with respect to a portion of     our expected future production | 
    
      | Lower oil and gas prices may cause us to record ceiling test write-downs | 
    
      | We use the full cost method of accounting for our oil and gas operations | 
    
      | Accordingly, we capitalize the cost to acquire, explore for and develop oil     and gas properties | 
    
      | Under full cost accounting rules, the net capitalized     costs of oil and gas properties (net of related deferred taxes), including     estimated capitalized                                         10       _________________________________________________________________    [48]Table of Contents                        Endeavour International Corporation       abandonment costs, may not exceed a “ceiling limit,” which is based upon the     present value of estimated future net cash flows from proved reserves,     discounted at 10prca and excluding cash flows related to estimated abandonment     costs, plus the lower of cost or fair value of unproved properties | 
    
      | If net     capitalized costs of oil and gas properties exceed the ceiling limit, we     must charge the amount of the excess to earnings | 
    
      | This is called a “ceiling     test write-down | 
    
      | ” This charge does not impact cash flow from operating     activities, but does reduce net income | 
    
      | The risk that we will be required to     write down the carrying value of oil and gas properties increases when oil     and natural gas prices are low | 
    
      | In addition, write-downs may occur if we     experience  substantial  downward  adjustments to our estimated proved     reserves | 
    
      | We cannot assure you that we will not experience ceiling test     write-downs in the future | 
    
      | Our  ability  to produce sufficient quantities of oil and gas from our     properties may be adversely affected by factors outside of our control | 
    
      | If     we are unable to produce oil and gas from our properties in commercial     quantities, our operations will be severely affected | 
    
      | Our  business  of  exploring  for and producing oil and gas involves a     substantial risk of investment loss | 
    
      | Drilling oil and gas wells involves the     risk  that  the  wells may be unproductive or that the wells, although     productive, do not produce oil or gas in economic quantities | 
    
      | Other hazards,     such as unusual or unexpected geological formations, pressures, fires,     blowouts, loss of circulation of drilling fluids, or other conditions may     substantially delay or prevent completion of any well | 
    
      | This could result in     a total loss of our investment in a particular property | 
    
      | Adverse weather     conditions also can hinder drilling operations | 
    
      | A productive well may become     uneconomic if water or other substances are encountered, which impair or     prevent the production of oil and gas from the well | 
    
      | In addition, production     from any well may be unmarketable if it is impregnated with water or other     deleterious  substances | 
    
      | We cannot assure you that oil and gas will be     produced from the properties in which we have interests, nor can we assure     the  marketability  of oil and gas that may be acquired or discovered | 
    
      | Numerous  factors  are beyond our control, including the proximity and     capacity  of  oil  and  gas pipelines and processing equipment, market     fluctuations  of  prices,  taxes,  royalties, allowable production and     environmental regulations | 
    
      | We cannot predict how these factors may affect     our business | 
    
      | We operate in foreign countries and are subject to political, economic and     other uncertainties | 
    
      | We  currently  have  operations  in the United Kingdom, Norway and the     Netherlands | 
    
      | We may expand international operations to other countries or     regions | 
    
      | International operations are subject to political, economic and     other uncertainties, including:       •   the risk of war, acts of terrorism, revolution, border disputes,     expropriation, renegotiation or modification of existing contracts, and     import, export and transportation regulations and tariffs;         •   taxation policies, including royalty and tax increases and retroactive     tax claims;         •   exchange controls, currency fluctuations and other uncertainties     arising  out  of foreign government sovereignty over our international     operations;         •   laws and policies of the US affecting foreign trade, taxation and     investment; and         •   the possibility of being subject to the exclusive jurisdiction of     foreign courts in connection with legal disputes and the possible inability     to subject foreign persons to the jurisdiction of courts in the United     States | 
    
      | Foreign countries occasionally have asserted rights to land, including oil     and gas properties, through border disputes | 
    
      | If a country claims superior     rights to oil and gas leases or concessions granted to us by                                         11       _________________________________________________________________    [49]Table of Contents                        Endeavour International Corporation       another country, our interests could be lost or decreased in value | 
    
      | Various     regions of the world have a history of political and economic instability | 
    
      | This instability could result in new governments or the adoption of new     policies  that might have a substantially more hostile attitude toward     foreign  investment | 
    
      | In an extreme case, such a change could result in     termination of contract rights and expropriation of foreign–owned assets | 
    
      | This would adversely affect our interests | 
    
      | If the operator of a prospect in which we participate does not maintain or     fails to obtain adequate insurance, our interest in such prospect could be     materially and adversely affected | 
    
      | Oil and gas operations are subject to particular hazards incident to the     drilling  and  production of oil and gas, such as blowouts, cratering,     explosions, uncontrollable flows of oil, gas or well fluids, fires and     pollution and other environmental risks | 
    
      | These hazards can cause personal     injury and loss of life, severe damage to and destruction of property and     equipment, pollution or environmental damage and suspension of operations | 
    
      | We  do not currently operate all of our oil and gas properties | 
    
      | In the     projects in which we own non-operating interests, the operator may maintain     insurance of various types to cover our operations with policy limits and     retention  liability  customary  in  the industry | 
    
      | The occurrence of a     significant adverse event that is not fully covered by insurance could     result in the loss of our total investment in a particular prospect, which     could have a material adverse effect on our financial condition and results     of operations | 
    
      | The cost of decommissioning is uncertain | 
    
      | We  expect  to  incur  obligations to abandon and decommission certain     structures in the North Sea | 
    
      | To date the industry has little experience of     removing oil and gas structures from the North Sea | 
    
      | Fewer than 10prca of the     400 structures have been removed and these were small steel structures and     sub sea installations in the shallow waters of the Southern North Sea | 
    
      | Certain  groups  have  been  established  to  study issues relating to     decommissioning and abandonment and how the costs will be borne | 
    
      | Because the     experience  is  limited,  we  cannot  predict  the costs of any future     decommissions for which we might become obligated | 
    
      | Our cost of compliance with environmental regulations could result in large     expenses | 
    
      | Our operations are subject to a variety of national, state, local, and     international laws and regulations governing the discharge of materials into     the  environment  or  otherwise  relating to environmental protection | 
    
      | Significant fines and penalties may be imposed for the failure to comply     with environmental laws and regulations | 
    
      | Some environmental laws provide for     joint and several strict liability for remediation of releases of hazardous     substances, rendering a person liable for environmental damage without     regard to negligence or fault on the part of such person | 
    
      | In addition, we     may be subject to claims alleging personal injury or property damage as a     result of alleged exposure to hazardous substances such as oil and gas     related products | 
    
      | Some  environmental  protection  laws and regulations may expose us to     liability arising out of the conduct of operations or conditions caused by     others, or for acts that were in compliance with all applicable laws at the     time  the  acts  were performed | 
    
      | Changes in the environmental laws and     regulations, or claims for damages to persons, property or the environment,     could expose us to substantial costs and liabilities | 
    
      | 12       _________________________________________________________________    [50]Table of Contents                        Endeavour International Corporation       Governmental  regulations  to  which we are subject could expose us to     significant fines and/or penalties and our cost of compliance with such     regulations could be substantial | 
    
      | Oil and gas exploration, development and production are subject to various     types of regulation by local, state and federal agencies | 
    
      | Regulations and     laws affecting the oil and gas industry are comprehensive and under constant     review  for  amendment and expansion | 
    
      | These regulations and laws carry     substantial penalties for failure to comply | 
    
      | The regulatory burden on the     oil and gas industry increases our cost of doing business and, consequently,     adversely affects our profitability | 
    
      | We are dependent on our executive officers and need to attract and retain     additional qualified personnel | 
    
      | Our  future success depends in large part on the service of William L     Transier and John N Seitz, both of whom have substantial experience in the     oil and gas industry | 
    
      | The loss of either of these executives could have a     material  adverse  effect on our business | 
    
      | Although we have employment     agreements  with  each  of Mr | 
    
      | Seitz, there can be no     assurance that such agreements will be enforceable in all circumstances or     that we will have the ability to retain their services due to resignation or     otherwise | 
    
      | Our future success also depends upon our ability to attract, assimilate and     retain highly qualified technical and other management personnel | 
    
      | There can     be no assurance that we will be able to attract, assimilate and retain key     personnel, and our failure to do so would have a material adverse effect on     our business | 
    
      | The trading price of our common stock may be volatile | 
    
      | The trading price of our common stock has from time to time fluctuated     significantly and in the future may be subject to similar fluctuations | 
    
      | The     trading price may be affected by a number of factors, including the risk     factors  set forth herein, as well as our operating results, financial     condition, announcements or drilling activities, general conditions in the     oil  and gas exploration and development industry, and other events or     factors | 
    
      | Smaller  capitalization  companies  like us often experience     substantial fluctuations in the trading price of their securities | 
    
      | We may     experience wide fluctuations in the market price of our common stock | 
    
      | There is a limited market for our common stock | 
    
      | Our common stock is traded on the American Stock Exchange | 
    
      | Historically,     there has not been an active trading market for a significant volume of our     common stock | 
    
      | We are not certain that an active trading market for our     common stock will develop, or if such a market develops, that it will be     sustained | 
    
      | If we are unable to fulfill commitments under any of our licenses, we will     lose our interest, and our entire investment, in such license | 
    
      | Our ability to retain licenses in which we obtain an interest will depend on     our ability to fulfill the commitments made with respect to each license | 
    
      | We     cannot assure you that we or the other participants in the projects will     have the financial ability to fund these potential commitments | 
    
      | 13       _________________________________________________________________    [51]Table of Contents                        Endeavour International Corporation       Our operations are dependent on other companies and other service providers     over which we have no control | 
    
      | We employ exploration and development personnel and we also rely upon the     services  of  geologists, geophysicists, chemists, engineers and other     scientists to assist in the exploration and analysis of our prospects to     determine  a  method  in  which  the  prospects  may be developed in a     cost-effective manner | 
    
      | We have developed relationships with a number of third party     service providers, but we cannot assure you that we will be able to continue     to rely on these providers | 
    
      | If any of these relationships are terminated or     are unavailable on terms that are favorable to us, then we may not be able     to execute our business plan | 
    
      | We have no control over the availability or cost of equipment and services     which are essential to our operations | 
    
      | The availability and cost of services and equipment which are necessary for     us to carry out our exploration and development activities are matters which     are beyond our control | 
    
      | The costs of these items (particularly drilling rigs     and related services) have risen substantially in the past two years and     could escalate even more in the future | 
    
      | These changes could make it more     difficult to execute our business plan | 
    
      | Our debt level could negatively impact our financial condition, results of     operations and business prospects | 
    
      | As of December 31, 2005, we had dlra81dtta25 million in outstanding indebtedness | 
    
      | Our  level  of  indebtedness  could have important consequences on our     operations, including:       •   making it more difficult for us to satisfy our obligations under our     indentures or other debt and increasing the risk that we may default on our     debt obligations;         •   requiring us to dedicate a substantial portion of our cash flow from     operating activities to required payments on debt, thereby reducing the     availability of cash flow for working capital, capital expenditures and     other general business activities;         •   limiting our ability to obtain additional financing in the future for     working  capital, capital expenditures, acquisitions and other general     business activities;         •   decreasing our ability to successfully withstand a downturn in our     business or the economy generally; and         •   placing us at a competitive disadvantage against other less leveraged     competitors | 
    
      | If  we fail to comply with the covenants and other restrictions in the     agreements governing our debt, it could lead to an event of default and the     acceleration of our repayment of outstanding debt | 
    
      | Our ability to comply     with these covenants and other restrictions may be affected by events beyond     our control, including prevailing economic and financial conditions | 
    
      | We may not have sufficient funds to make such repayments | 
    
      | If we are unable     to repay our debt out of cash on hand, we could attempt to refinance such     debt,  sell assets or repay such debt with the proceeds from an equity     offering | 
    
      | We cannot assure you that we will be able to generate sufficient     cash flow from operating activities to pay the interest on our debt or that     future borrowings, equity financings or proceeds from the sale of assets     will be available to pay or refinance such debt | 
    
      | Factors that will affect     our  ability to raise cash through an offering of our capital stock, a     refinancing  of  our debt or a sale of assets include financial market     conditions and our market value and operating performance at the time of     such offering                                         14       _________________________________________________________________    [52]Table of Contents                        Endeavour International Corporation       or other financing | 
    
      | We cannot assure you that any such offering, refinancing     or sale of assets can be successfully completed | 
    
      | Upon specified change of control events, each holder of those notes     may require us to purchase all or a portion of the holder’s notes at a price     equal to 100prca of the principal amount, plus accrued and unpaid interest, if     any,  up  to  but  excluding  the  date  of  purchase, plus in certain     circumstances, a make-whole premium | 
    
      | We cannot assure you we would have     sufficient financial resources to purchase the notes for cash or satisfy our     other debt obligations if we are required to purchase the notes upon the     occurrence of a change of control | 
    
      | In addition, events involving a change of     control may result in an event of default under other debt we may incur in     the future | 
    
      | Because we are a holding company, our ability to pay our debts depends upon     the ability of our subsidiaries to pay us dividends and to advance us funds | 
    
      | In  addition,  our  ability  to participate in any distribution of our     subsidiaries’  assets  is generally subject to the prior claims of the     subsidiaries’ creditors | 
    
      | Because we conduct our business primarily through our subsidiaries, our     ability to pay our debts depends upon the earnings and cash flow of our     subsidiaries and their ability to pay us dividends and advance us funds | 
    
      | Contractual and legal restrictions applicable to our subsidiaries could     limit our ability to obtain cash from them | 
    
      | Our rights to participate in any     distribution  of  our  subsidiaries’  assets  upon  their liquidation,     reorganization or insolvency generally would be subject to the prior claims     of the subsidiaries’ creditors |