Armia Krajowa, or the Home Army, was the dominant Polish resistance movement during World War II. Established in 1942, it operated under the command of the Polish government-in-exile and aimed to fight against the German occupation of Poland. The organization was composed of various military and civilian groups, and it played a crucial role in gathering intelligence and sabotaging German operations. The most notable action of the Armia Krajowa was the Warsaw Uprising in 1944, where they attempted to liberate Warsaw from German control. Despite initial successes, the uprising was ultimately suppressed, leading to significant loss of life and destruction in the city. The legacy of the Armia Krajowa remains an important part of Polish history and national identity.