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

On 24 March 1942, the first stage of the evacuation of the soldiers serving in the so-called Anders Army from the Soviet Union to Persia began. About 78,000 exiles, who joined the Polish army and 37 thousand civilians, including about 18,000 Polish children were evacuated in total.

Father Jan Cieplak was auxiliary bishop of the Mogilev archdiocese, at that time the largest Roman Catholic archdiocese in the world, covering the whole of Russia up to Sakhalin.

The Union of Soviet Socialist Republics was the first communist state in history. The decision to create it was taken on 30 December 1922.

On 23 July 1920, the first ship from Vladivostok with Polish children evacuated from Siberia arrived in Tsuruga, Japan. By 1922, a total of more than 700 kids had arrived in the Land of the Cherry Blossom. Their first stops were the cities of Tsuruga and Osaka.

Volunteer Polish units in Siberia began to organise as early as the turn of 1917/1918.