三帝同盟
In one of the secret articles of the renewed League of the Three Emperors of 1881, Austria-Hungary had asserted the right 'to annex Bosnia and Herzegovina at whatever moment she shall deem opportune', and the claim was repeated intermittently in Austro-Russian agreements. This was not contested by Russia, but St Petersburg maintained the right to impose conditions. Izvolsky, with the support of Tsar Nicholas II proposed that the annexation of Bosnia-Herzogovina be exchanged for Austrian support for improved Russian access to the Turkish Straits. Izvolsky met with the Austrian Foreign Minister, Baron (later Count) Alois Lexa von Aehrenthal, at the Moravian castle of Buchlov on September 16, 1908, and there agreed to support Austria's annexation of Bosnia and Herzegovina in exchange for Austria's assent to the opening of the Straits to Russia; and to support such an opening, at any subsequent diplomatic conference.