Polish government-in-exile

The Polish government-in-exile was formed in the aftermath of the September 1939 invasion and subsequent occupation of Poland by Germany, the Soviet Union, and the Slovak Republic, which brought to an end the Second Polish Republic. Despite the occupation of Poland by hostile powers, the government-in-exile exerted considerable influence in Poland during World War II through the structures of the Polish Underground State and its military arm, the Armia Krajowa (Home Army) resistance.

Source: Wikipedia — Polish government-in-exile (CC BY-SA 4.0)