Following the conclusion of the Greek campaign in Macedonia, the Army of Epirus received considerable reinforcements. This enabled it to capture the Yanya Fortified Area in the aftermath of the Battle of Bizani (19–21 February 1913). By May 1913, the numerically inferior Ottomans had suffered a series of serious defeats to the League's armies on all fronts. The League had captured most of the Ottoman Empire's European territories and was rapidly approaching Constantinople. On 30 May, the two sides signed the Treaty of London which granted the League's members all Ottoman lands west of a line stretching from Enos on the Aegean Sea to north of Midia on the Black Sea, as well as Crete. The fate of Albania and the Aegean islands occupied by Greece was to be determined by the Great Powers.