1939: War officially declared against Germany - allied countries get involved
1940: Hitler’s **blitzkrieg** technique got control of Poland (half with USSR), Holland, Belgium, France - tried taking over Britain but were unsuccessful
1941: Germany invaded Greece breaking their deal with Soviet Union, so they invaded the Soviet Union too - Japan bombs Pearl Harbour in Hawaii so US declares war on Japan and joins WWII
1943: US and Britain take control of Italy
1944: US, Britain, and Canada land on French beaches (D-day) and eventually liberate France
1945: Allied forces close in on Germany and end Europe war when Hitler commits suicide