Great Britain entered WW2 because of an alliance treaty with Poland.
He was the leader of Great Britain mostly during WW2.
Italy entered WW2 on June 10, 1940 when Mussolini attacked Great Britain and France. I hope this helps :)
Yes
In Great Britain, during WW2.
Britain
The Axis forces led by Nazi Germany, and Japan after they entered the war in December 1941
The Allies
Poland.
I believe that England and Switzerland were the only European countries not conquered in WW2 and if not Switzerland than Ireland
Yes, WW2 and WW1. Britain was on the winning side both times.
Germany did not invade Britain in WW2. Britain has not been invaded for a thousand years.