In the Balkans, the Greeks had been reluctant to allow British troops into the country, because Britain could not spare enough forces to guarantee victory. They had, however, accepted aid from the RAF in their war with the Italians in Albania. As it became likely Germany would attack Greece, four British divisions were switched from North Africa to reinforce Greek Army. The advanced guards of these troops began arriving in March 1941, triggering the entry of German forces into Bulgaria, which made clear the German intent to invade Greece.