When the Second World War ended, Joseph Stalin reneged on his Yalta promises and a Communist government was installed in Poland. Still, the British government wanted to maintain cordial relations with Stalin, and so tried to persuade Poles in the UK to leave. Most Poles felt betrayed by their wartime allies. They refused to return to Poland, because of a range of reasons: the Soviet repression of Polish citizens, Soviet conduct around the 1944 Warsaw Uprising, the Trial of the Sixteen and other executions of pro-democracy Poles such as former members of the Home Army including Emil Fieldorf and Witold Pilecki, and finally, the creation of the Eastern Bloc.