<Li> France: 3 September 1939--On 22 June 1940, Vichy France under Marshal Pétain formally capitulated to Germany, and became neutral . This capitulation was denounced by General de Gaulle, who established the Free France government - in - exile, which continued to fight against Germany . This led to the Provisional Government of the French Republic, which was officially recognized by the other Allies as the legitimate government of France on 23 October 1944 . Pétain's 1940 surrender was also legally nullified, so France is considered an Ally throughout the war . </Li> <Li> United Kingdom: 3 September 1939 <Ul> <Li> India: 3 September 1939 </Li> </Ul> </Li> <Ul> <Li> India: 3 September 1939 </Li> </Ul> <Li> India: 3 September 1939 </Li>

How many states were part of the union by 1945