Endeavour Announces Closing of Common Stock Offering and Full Exercise of Over-Allotment Option

HOUSTON, March 30, 2011 - Endeavour International Corporation (NYSE: END) (LSE: ENDV) today
announces the closing of its previously-announced public offering of
11,500,000 shares of its common stock, which includes 1,500,000 shares issued
and sold pursuant to the full exercise of the underwriters' over-allotment
option. Endeavour intends to use the net proceeds from the offering to retire
all $81.3 million of its 6% Convertible Senior Notes due 2012. The remaining
net proceeds will be used for general corporate purposes.

Citigroup Global Markets Inc. acted as sole book-running manager for the
offering. Canaccord Genuity Inc., C. K. Cooper & Company, Global Hunter
Securities, LLC and Rodman & Renshaw, LLC acted as co-managers for the
offering. Copies of the prospectus supplement and the accompanying base
prospectus may be obtained from:

                         Citigroup Global Markets Inc.
                       Attention: Prospectus Department
                            Brooklyn Army Terminal
                          140 58th Street, 8th Floor
                              Brooklyn, NY 11220
                             Phone: +1-800-831-9146
                          batprospectusdept@citi.com

A copy of the prospectus supplement and base prospectus may also be
obtained at no charge at the Securities and Exchange Commission's website, at
www.sec.gov.

This press release is neither an offer to sell, nor a solicitation of an
offer to buy, nor shall there be any sale of these securities in any
jurisdiction in which such offer, solicitation or sale would be unlawful
prior to registration or qualification under the securities laws of any such
jurisdiction. A registration statement, as amended, relating to the
securities has been filed with the Securities and Exchange Commission and was
declared effective on February 9, 2010.

Endeavour International Corporation is an independent oil and gas company
engaged in the production, exploration, development and acquisition of crude
oil and natural gas in the U.S. and the North Sea.

Certain statements in this news release should be regarded as
"forward-looking" statements within the meaning of the securities laws. These
statements speak only as of the date made. Such statements are subject to
assumptions, risk and uncertainty. Actual results or events may vary
materially.

Investors are urged to also consider closely the disclosure in our
filings with the SEC, available from our website at
www.endeavourcorp.com. Endeavour is also subject to the requirements
of the London Stock Exchange and considers the disclosures in this release to
be appropriate and/or required under the guidelines of that exchange.

Investor Relations, Mike Kirksey, +1-713-307-8788, or Darcey Matthews, +1-713-307-8711, both of Endeavour; or UK Media, Philip Dennis, +44(0)207-861-3919, or Henry Lerwill, +44(0)207-861-3169, both of Pelham Bell Pottinger, for Endeavour International Corporation