Polish resistance movement in World War II

The Polish resistance movement in World War II (Polski ruch oporu w czasie II wojny światowej), with the Polish Home Army at its forefront covered both German and Soviet zones of occupation. The Polish resistance is notable among others for disrupting German supply lines to the Eastern Front (damaging or destroying 1/8 of all rail transports), and providing intelligence reports to the British intelligence agencies (providing 43% of all reports from occupied Europe). It was a part of the Polish Underground State. The largest of all Polish resistance organizations was the Armia Krajowa (Home Army, AK), loyal to the Polish government in exile in London. The AK was formed in 1942 from the Union of Armed Struggle (Związek Walki Zbrojnej or ZWZ, itself created in 1939) and would eventually incorporate most other Polish armed resistance groups (except for the communists and some far-right groups). It was the military arm of the Polish Underground State and loyal to the Polish government in Exile. Most of the other Polish underground armed organizations were created by a political party or faction, and included: The Bataliony Chłopskie (Peasants' Battalions). Created by the leftist People's Party around 1940–1941, it would partially merge with AK around 1942–1943. The Gwardia Ludowa WRN (People's Guard of WRN) of Polish Socialist Party (PPS) (joined ZWZ around 1940, subsequently merged into AK) The Konfederacja Narodu (Confederation of the Nation). Created in 1940 by far-right Obóz Narodowo Radykalny-Falanga (National Radical Camp Falanga). It would partially merge with ZWZ around 1941 and finally join AK around fall 1943. The Narodowa Organizacja Wojskowa (National Military Organisation), established by the National Party in 1939, mostly integrated with AK around 1942. Narodowe Siły Zbrojne (National Armed Forces); created in 1943 from dissatisfied NOW units, which refused to be subordinated to the AK. The Obóz Polski Walczącej (Camp of Fighting Poland), established by the Obóz Zjednoczenia Narodowego (Camp of National Unity) around 1942, subordinated to AK.