Because that was the only way to end the war.
Normandy, France
In 1944
because the allies were landing in Italy
IN ORDER:SicilyItalyAnd on the Normandy beaches of France
a couple of countries weren't expected the invasions like: Poland but Germany were all ready to invade any country at war. the allies allowed Germany to invade Poland.
The US did not exactly invade Germany. Maybe you are referring to when the Allies invaded France which the Germans had occupied.Some say the US first crossed the German border at the Remagen Bridge. However, earlier, the 85th Cavalry Reconnaissance Squadron, a unit of the 5th Armored Division, crossed the border but returned back to their unit.
There were countless invasions during World War II. I'll give a summary of the major invasions here: [pre-WWII]: Japan invades China in 1937 1939 Germany invades Czechoslovakia Germany and Soviet Union invade Poland Soviet Union invades Finland 1940 Germany invades Denmark and Norway Germany invades Holland, Belgium, Luxemborg, and France 1941 Germany invades Greece and Crete Germany invades the Soviet Union Japan invades British-held Singapore, Malaya, and Hong Kong, the Dutch East Indies, the Philippines, the American Pacific territories of Guam and Wake Island, and Borneo. 1942 Japan invades the New Guinea, the Solomon Islands, and the Aleutian Islands Allies invade Solomon Islands and Vichy-French Northwest Africa 1943 All of Axis-held North Africa retaken by Allies Allies invade Sicily, then Italy and Corsica Allies invade rest of the Solomon Islands and invade the Gilbert Islands 1944 Allies invade France Allies invade the Marshall Islands, Marianas Islands, and the Philippines 1945 Allies invade Germany Soviet army captures Berlin on May 2 - Victory in Europe Day soon thereafter (May 8) Allies invade Iwo Jima and Okinawa Soviet Union invades Japanese-held Manchuria Japan surrenders, August 1945; Victory in Japan Day is September 2
The Western Allies should invade France.
It brought in the Americans on the side of the Allies. But the biggest cause of Germany's defeat was their decision to invade Russia.
Yes
France is currently allies with the UK, US, Australia, and Germany
Japan didn't invade Germany. During World War II, Japan actually joined Germany. It was part of the Axis which included Germany, Italy and Japan. After the United States declared war on Japan, Italy and Germany, as Japan's allies, declared war on the United States.