In 1940 German air force attacked Britain repeatedly but was not successful, mainly because of the British victory in the battle of Britain. In 194 1 germany invaded Russia and Japan attacked Pearl Harbor, an action which brought the US into the war. In 1942. Japan expanded its control over Asia but was later checked by allied forces in the Pacific In the same year, at the battle of el alamein, Allied forces began to defeat germany and italy in northern Africa. In 1943 the Allies landed in italy and russian forces began to advance on germany from the east In june 1944 the allies invaded northern Europe with the normandy landings and began to defeat Germany in Europe. The war ended in May 1945 when the Allies took control of germany. Hitler killed himself, and Japan was defeated a few months later Germany and Japan surrendered separately in 1945• In 1940 German air force attacked Britain repeatedly but was not successful, mainly because of the British victory in the Battle of Britain. In 1941 Germany invaded Russia and Japan attacked Pearl Harbor, an action which brought the US into the war. In 1942, Japan expanded its control over Asia but was later checked by Allied forces in the Pacific. In the same year, at the Battle of El Alamein, Allied forces began to defeat Germany and Italy in northern Africa. In 1943 the Allies landed in Italy and Russian forces began to advance on Germany from the east. In june1944 the Allies invaded northern Europe with the Normandy landings and began to defeat Germany in Europe. The war ended in May 1945 when the Allies took control of Germany. Hitler killed himself, and Japan was defeated a few months later. Germany and Japan surrendered separately in 1945