Endeavour Completes Financing Transaction

HOUSTON, August 16, 2010 - Endeavour International Corporation (NYSE Amex: END) (LSE: ENDV) today
announced the closing of a three-year US$150 million senior secured credit
facility led by Cyan Partners, LP, a middle market direct lending fund. Of
the total proceeds, US$66 million was used to repay senior bank and second
lien facilities. The remaining funds will be spent to further the company's
growth program in the United Kingdom and the United States and for general
business purposes.

"The flexibility of this financing arrangement meets the needs of our
current development projects and allows us to accelerate future growth
plans," said J. Michael Kirksey, executive vice president and chief financial
officer. "We are pleased to have formed this partnership with Cyan, which
recognizes the potential Endeavour offers and wants to play a part in
bringing this opportunity to reality."

The facility includes provisions that permit the company to sell assets
and reinvest the proceeds in the business, make acquisitions and incur
additional debt. It bears cash interest of 12 percent plus three percent
payment-in-kind that the company may pay in cash at its option. The facility
contains a standard covenant package and is callable after the first year.
Houlihan Lokey acted as the company's exclusive placement agent for the
financing facility. As part of the overall financing transaction, Cyan
purchased 8.99 million shares of Endeavour common stock for US$1.13 per
share, the closing price as of Friday, August 13, 2010.

This announcement is neither an offer to sell nor a solicitation of an
offer to buy any of these securities and shall not constitute an offer,
solicitation or sale in any jurisdiction in which such offer, solicitation or
sale is unlawful.

Endeavour International Corporation is an oil and gas exploration and
production company focused on the acquisition, exploration and development of
energy reserves in the North Sea and the United States. For more information,
visit endeavourcorp.com.

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

Mike Kirksey, Investor Relations of Endeavour, +1-713-307-8788