On May 18, 1944, soldiers of the 2 Polish Corps hung the Polish flag on the ruins of the Monte Cassino monastery.

The date of 11 November 1918, being the day on which Poland regained its independence, is a symbolic date. Exactly on that day, an armistice ending the First World War was concluded in a wagon in the forest of Compiègne.

On 22 October 1939 the Soviets organised elections of delegates to the so-called people’s assemblies in the annexed Eastern Borderlands (Kresy) of the Second Polish Republic. After a rapid propaganda campaign accompanied by terror and violence, the “vote” took place.

The parade on Unia Lubelska Street in Brest began at 4pm on 22 September 1939 and lasted only about 45 minutes. That was enough time to show the whole world the newly formed alliance of the Soviet Union and Nazi Germany.

The Soviet Union's invasion of Poland on 17 September 1939 came as a shock to Polish society. For several days the country had been defending itself against the German invasion.

On May 12, 1935, Marshal Józef Piłsudski died. He was buried at Wawel, in the crypt under the Tower of Silver Bells.