Gallery of photos of Polish Army in Berlin Operation. Soldiers raising border signs at Odra and Nysa rivers (Oder and Neisse). Then in Berlin, including Polish Flag fitted over German buildings. It should be noted, that despite of post war communist propaganda of Polish-Soviet brotherhood Polish flags were immediately removed by Soviets. Some Polish soldiers were arrested and luckily avoided being shot after raising flags.
Source: Archiwum Dokumentacji Mechanicznej via Polish Foreign Ministry licence .