D-Day was the Allied invasion of Normandy on June 6, 1944, where over 300,000 troops landed on the beaches of northern France and fought German forces. By the end of August, the Allies had liberated Paris and pushed the Germans out of northwestern France. The Battle of Iwo Jima involved intense fighting between the US Marines and Japanese forces over the island of Iwo Jima that lasted 5 weeks, with the US eventually defeating Japan. During WWII, many civilians continued working to support the war effort, while others took shelter or evacuated major cities, and women frequently took jobs in factories supplying the military.