With an estimated seven "divisions" and 12,000 men by mid-1943, ELAS units were active the length of Greece, with the exception of the Pindus Mountains area, held by EDES.
The initial successes of the guerrillas against the occupation forces in 1943 were brought to an abrupt end when the German 1st Mountain Division moved from Serbia into Greece and Albania in June to bolster the Italian effort. The guerrillas, with ample warning by their excellent intelligence system, planned a heavy blow against the new enemy before he could establish himself in his occupation role.
The guerrilla operation was to be launched as the mountain troops moved south through the village of Leskovic, high in the mountains along the Greek-Albanian frontier, on the Albanian side. (Map 4.) At that time, however, the border was crossed at will by local inhabitants, and the operation was primarily a Greek undertaking.
As was their custom, the guerrillas cleared the village of all inhabitants, then placed their own men in position in the buildings along the main street. Their plan was to allow the advance guard to pass, and then to fire on the main body when the troops were confined to the street and roadway. A large force of guerrillas would then emerge from hiding places in the hills nearby to complete the destruction of the demoralized Germans.
Instead of marching blindly into the village, however, the Germans first enveloped it from either flank, and a number of the guerrillas opened fire prematurely. Deploying rapidly, the main body of the mountain troops surrounded Leskovic and shelled it thoroughly before launching their assault. The guerrilla force in hiding outside the village was routed by artillery fire when it attempted to relieve the ambushers, and Leskovic was reduced in a house-to-house operation. The stone construction of the houses afforded considerable protection to the besieged guerrillas, who inflicted heavy casualties on the mountain troops before the latter could bring a sufficient number of infantry and antitank guns into action to batter down their positions.
A number of the irregulars escaped by posing as fleeing civilians while the battle was at its height. When the Germans recognized their opponents at close range, however, they halted everyone attempting to leave the village, and soon held a motley collection of ragged men and youths. Examinations of these prisoners and of the bodies found in the rubble of Leskovic revealed most of the guerrillas to have been in civilian clothing or parts of German and Italian uniforms, with their only insignia a small hammer and sickle. The aggressive attitude of the new occupation troops, with their heavier firepower and greater battle experience, soon discouraged such ventures as the attack at Leskovic, and for a time EDES also ceased all active operations against them. However, in deference to the British Middle East
