German Nazi forces had invaded Poland two days earlier, claiming to be acting in self-defence following a ‘false flag’ operation.

Attended by the “Big Three” Allied leaders, the conference saw United States President Franklin D. Roosevelt, British Prime Minister Winston Churchill and Soviet Premier Joseph Stalin meet to discuss the government of post-war Europe.

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 3rd September 1939, the Second World War officially began when France and the United Kingdom – together with Australia and New Zealand – declared war on Germany.