Statement Regarding Additional Information That May Become AvailableIf a transaction is to be proposed to the stockholders of Mesa Energy, Mesa Energy and Armada Oil would file with the Securities and Exchange Commission and distribute a Registration Statement on Form S-4 covering securities to be issued in the transaction. It is expected that Mesa Energy shareholders would receive a prospectus and proxy statement or information statement, as applicable, in connection with such transaction. The final terms of the prospective transaction remain subject to change and would only be reflected in a binding definitive agreement that remains to be negotiated between the companies. A copy of the definitive merger agreement would be filed along with the prospectus and proxy statement /information statement. Mesa Energy stockholders would be urged to read these and any other related documents the corporation may issue. If and when these documents are filed, they will be available for free at the SEC's website, www.sec.gov . Additional information on how to obtain these documents from Mesa Energy would be made available to stockholders if and when a transaction is to occur. Such documents are not currently available. No Offer or Solicitation to Sell This communication shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of 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. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended. Mesa Energy, its directors and executive officers, may be deemed to be participants in the solicitation of proxies or consents from Mesa Energy's stockholders in connection with any transaction that might be proposed to such stockholders. Information about the directors and executive officers of Mesa Energy and their ownership of Mesa Energy and Armada Oil stock will be included in the prospectuses and proxy/consent solicitation statements if and when they become available.