In March 1915, when the Russian foreign minister Sergey Sazonov met with British ambassador George Buchanan and French ambassador Maurice Paléologue, he stated that a lasting postwar settlement demanded full Russian possession of the capital city of the Ottoman Empire, Constantinople, the straits of the Bosphorus and Dardanelles, the Sea of Marmara, southern Thrace up to the Enos-Midia line as well as parts of the Black Sea coast of Anatolia between the Bosphorus, the Sakarya River and an undetermined point near the Bay of Izmit. The Russian Imperial government planned to replace the Muslim population of Northern Anatolia and Istanbul with more reliable Cossack settlers.