This is an opinion type question.
The USSR made a great contribution to the defeat of Germany, however it is not true that they made a bigger contribution to the victory than all the other Allied nations.
In fact, from August 1939 through June 22, 1941 the USSR was an ally of Hitler's Germany, and supplied much of Germany's food requirements! Even after the USSR was attacked by Germany, the USSR was not very cooperative with the other Allied Powers, and sometimes obstructive. They were also involved in the murder of Polish (Allied) military officers.
The USSR suffered the most casualties of any Allied Power, fielded the largest Allied Army, and engaged the largest part of the German Army. However its contribution in terms of strategic airpower, seapower, logistics & economy were smaller than the western Allies. The USSR did not fight the Japanese until August 1945, when the Japanese were already defeated.
it put allied force back in Europe in order to attack and defeat German forces
The Battle of the Atlantic was a see saw maritime action which began in 1939 with the commencement of hostilities and only ended with the defeat of Germany in May 1945. The allied goals were to blockade Germany by sea; to defeat the U-boat menace; and to keep open the supply lines between the U.S. , Britain, and the U.S.S.R. The German goal was to destroy allied shipping. The battle was a strategic victory for the allies. The cost was heavy on both sides: 3,500 allied merchant ships and 783 German submarines were sunk.
The outcome of D-Day was the defeat of Hitler's 'Atlantic Wall' and the death and capture of thousands of German troops as Allied troops overcame them.
Allied naval blockade of German ports were causing hardship to German citizens and hampering Germany's war effort. However, from the various naval battles with the Royal Navy, the Imperial German Navy had learned that it can not defeat the Allied on surface battle. Hence the aims of lifting Allied naval blockade on German ports and crippling the shipping bloodline of British Empire can not be achieved without the use of submarines. However, normal submarine warfare where U-boats have to surface and reveal its presence before searching and attacking is deemed to be too cumbersome, hence the use of unrestricted submarine warfare.
"Europe First" strategy
it put allied force back in Europe in order to attack and defeat German forces
The Russian troops and the Russian winter and Hitler's bombing of radar stations are some of the factors that contributed to the German defeat in the battle of Stalingrad.
The Russian winter
No Italy was allied with Germany during WW2. Italy later surrendered.
Surely, you know the answer. The Allied countries aren't under German rule and never have been.
The United States led Allied forces in an invasion of German territory in Western Europe.
it put allied forces back in Europe which allowed them to attack and defeat the German forces
The United States led Allied forces in an invasion of German territory in Western Europe.
The United States led Allied forces in an invasion of German territory in Western Europe.
The United States led Allied forces in an invasion of German territory in Western Europe.
As Supreme Commander, Allied Forces in Europe during World War II, Eisenhower was responsible for co-ordinating the defeat of the German forces under Adolf Hitler.
Ernest J. King and Royal E. Ingersoll