in 1939. Home Army was the largest Polish partisan organization; moreover, organizations such as peasant Bataliony Chlopskie, created primarily for self—defence against the Nazi German abuse, or the armed wing of the Polish Socialist Party and most of the nationalist National Armed Forces did subordinate themselves, before the end of the World War II, to the very Home Army. The communist Gwardia Ludowa remained indifferent and even hostile towards the Home Army, and of two Jewish organizations, the Jewish Military Union did cooperate with the Home Army, when the leftist and pro-Soviet Jewish Combat Organization did not. Both Jewish combat organizations staged the Ghetto uprising in 1943. Armia Krajowa staged Warsaw Uprising in 1944, amongst other activities. Bataliony Chlopskie fought mainly in Zamosc Uprising. The Polish partisans faced many enemies. The main enemies were the Nazi Germans, Ukrainian nationalists, Lithuanian Nazi collaborators, and even the Soviets. In spite of the ideological enmity, the Home Army did launch a massive sabotage campaign after the Germans began Operation Barbarossa. Amongst other acts of sabotage, the Polish partisans damaged nearly 7,000 locomotives, over 19,000 railway cars, over 4,000 German military vehicles and built-in faults into 92,000 artillery projectiles as well as 4710 built-in faults into aircraft engines, just to mention a few and just in between 1941 and 1944. In Ukraine and southeastern Poland, the Poles fought against the Ukrainian nationalists and UPA (Ukrainian Insurgent Army) to protect the ethnic Poles from mass murder visited upon them during Massacres of Poles in Volhynia and Eastern Galicia. They were aided, until after the war was over, by the Soviet partisans. At least 60,000 Poles lost their lives, the majority of them civilians, men, women, and children. Some of the victims were Poles of Jewish descent who had escaped from the ghetto or death camp. The majority of the Polish partisans in Ukraine assisted the invading Soviet Army. Few of them got mistreated or killed by the Soviets or the Polish communists. In Lithuania and Belarus, after a period of initial cooperation, the Poles defended themselves against the Soviet partisans as well as fought against the Lithuanian Nazi collaborators. The Poles failed to defeat the Soviet Partisans, but did achieve a decisive victory against the Lithuanian Nazi collaborators, Battle of Murowana Oszmianka. Afterward, about half of the Polish partisans in Lithuania assisted the invading Soviet Army, and many ended up mistreated and even killed by