Endeavour Announces Public Offering of Common Stock

HOUSTON, March 16, 2011 - Endeavour International Corporation (NYSE: END) (LSE: ENDV) today
announces the commencement, subject to market conditions, of an underwritten
public offering of 8.0 million shares of its common stock. In addition,
Endeavour intends to grant the underwriters a 30-day option, solely to cover
over-allotments, to purchase up to an additional 1.2 million shares of its
common stock.

Endeavour intends to use the net proceeds from the offering to retire all
$81.3 million of its 6% Convertible Senior Notes due 2012. Any remaining net
proceeds will be used for general corporate purposes.

Citigroup Global Markets Inc. is acting as sole book-running manager for
the offering. The offering will be made only by means of a preliminary
prospectus supplement and related base prospectus, copies of which may be
obtained from:

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

A copy of the preliminary 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. The proposed offerings will be made only by means of a
preliminary prospectus supplement and related base prospectus. 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, Henry Lerwill, +44-(0)-207-861-3169, both of Pelham Bell Pottinger, for Endeavour