In response to the Russian proximity to the straits the British, against the wishes of the Sultan, intervened in the war. A large task force representing British naval supremacy entered the straits of Marmara and anchored in view of both the royal palace and the Russian army. The British may have saved the Ottoman Empire once again, but it ended the rosy relations between the two powers that had endured since the Crimean War. Looking at the prospect of a British entry into the war the Russians decided to settle the dispute. The Treaty of San Stefano gave Romania and Montenegro their independence, Serbia and Russia each received extra territory, Austria was given control over Bosnia, and Bulgaria was given almost complete autonomy. The hope of the Sultan was that the other great powers would oppose such a one-sided resolution and a conference would be held to revise it. His desire became reality and in 1878 the Congress of Berlin was held where Germany promised to be an "honest broker" in the treaty's revision. In the new treaty Bulgarian territory was decreased and the war indemnities were cancelled. The conference also again hurt Anglo-Ottoman relations by giving the British the island of Cyprus. While annoyed at British Prime Minister Benjamin Disraeli, the Sultan had nothing but praise for Otto von Bismarck who forced many of the major concessions upon Russia. These close Germano-Ottoman relations would persist until both empires' very end.