On the 27th January 1945, Soviet soldiers from the 322nd Rifle Division liberated the Auschwitz-Birkenau concentration camp near the Polish city of Oświęcim.

On the 20th January 1942, a number of senior Nazis met at the Wannsee Conference where they discussed what was referred to as the Final Solution to the Jewish Question.

Boris III became Tsar of Bulgaria at the end of the First World War, just four days after his father, Ferdinand I, signed the Armistice of Thessalonica with the Allied Powers.