In 1915, while Churchill was preparing his disastrous Gallipoli adventure, British diplomacy was attempting to win allies for its war against the Turks in the Balkans. The British mission in Sofia reported that Bulgaria might be prepared to attack Turkey, although this hope was soon dashed when Bulgaria joined the Central Powers to attack Serbia instead. In early March Churchill received more encouraging news from Athens. The Greek Prime Minister Venizelos promised to send three army divisions to Gallipoli. He assured a gleeful Churchill that the King Constantine, known to be pro-German, would not object.