World War 2 from 1939-1942 By facebooker_2866977093384269 Sep 1, 1939 Hitler Invades Poland Sep 3, 1939 World War II Begins France, Britain, Australia, and New Zealand declare war on Germany Sep 17, 1939 Soviet Union invades Poland Sep 27, 1939 Warsaw surrenders to Nazis Dec 14, 1939 Soviet Union expelled from the League of Nations Apr 9, 1940 Nazis invade Denmark and Norway May 10, 1940 Nazis invade France, Belgium, Luxembourg and the Netherlands Jul 23, 1940 Soviets take Lithuania, Latvia, and Estonia Mar 11, 1941 Lend-Lease Act Apr 17, 1941 Nazis invade Greece and Yugoslavia Aug 1, 1941 US Oil Embargo Sep 3, 1941 First use of gas chambers at Auschwitz Jan 1, 1942 Declaration of United Nations 1942 Auschwitz first mass murder Jan 26, 1942 First American forces arrive in Great Britain Jul 22, 1942 First deportations from Warsaw to Concentration camps Sep 13, 1942 Battle of Stalingrad