The question could be referring to the Conference at the Congress of Berlin in 1890, where the Balkans were rearranged among the European powers. The Ottoman Empire didn't have any formal alliances at that conference, in fact Germany, led by Otto von Bismarck, Russia were interested in removing the weakened Ottoman Empire from Bulgaria. This they did, more or less, making Bulgaria a semi-autonomous region under Ottoman influence. They also limited Ottoman (and for that matter, Russian) influence in Bosnia, which fell under the Austrian sphere of influence. The Ottoman Empire was isolated at the conference, a situation that reflected its declining status as the "sick man of Europe."