The Home Army (AK) or the Armed Forces in the Country, codenamed "PZP" (Polish Insurgent Union) - the secret armed forces of the Polish Underground State[1] during World War II, formed by renaming the Union of Armed Struggle (established in November 1939) by order of the Commander-in-Chief, Lieutenant General Władysław Sikorski on February 14, 1942[2]. It operated on the territory of the Republic of Poland, occupied by Germany and the USSR (after the Red Army entered the territory of the Polish state on January 4, 1944)[3]. The Armed Forces in the Country were an integral part of the Polish Armed Forces, subordinated to the Commander-in-Chief.
The largest military operation of the Home Army was Operation "Burza" and the Warsaw Uprising as part of it[4]. The strategic, although unrealized goal of the Home Army was to conduct a general uprising in occupied Poland in the last phase of World War II[5].