More than two weeks ago, representatives of Britain, France and Russia started secret meetings to draft an agreement as to the division of the Ottoman Empire should it be conquered.

On March 18, 1915 The Constantinople Agreement was reached between the secret government officials representing Britain, France and Russia. Russia would be given the area around Constantinople together with a portion of the hinterland on either coast in Thrace and Asia Minor. Constantinople, however, was to be a free port. In return, Russia consented to British and French plans for territories or for spheres of influence in new Muslim states in the Middle Eastern parts of the Ottoman Empire.

Text of The Constantinople Agreement 1915

http://en.wikipedia.org/wiki/Constantinople_Agreement