I think it was reference from
http://en.wikipedia.org/wiki/Allies_of_World_War_I#Leaders
* Raymond Poincaré - President of France
During WWI, the Supreme Commander of Allied Force was Ferdinand Foch. He was a French Marshall and given this new command in 1918.
Ferdinand Foch
The Supreme Allied Commander, during D-Day at least, was Dwight D. Eisenhower.
The commander of Allied Armies during World War I was Ferdinand Foch. His position gave him responsibility for all British, French and American forces on both the Western and Italian fronts. Erich Ludendorff served as Supreme Commander of the German forces.
Dwight D. Eisenhower
The answer to the question is Germany. Germany was not one of the Allied Powers during World War 1. The Allied Powers during World War 1 were: Russia The US France
Dwight Eisenhower was the Supreme Allied Commander during WWII.
Eisenhower commanded the allied forces in Europe during WWII.
General Dwight David Eisenhower.
The commander of the Allied forces in the South Pacific during World War II was General Douglas MacArthur
Gen. Dwight Eisenhower was Supreme Commander of all allied forces.
The Supreme Allied commander during D-Day, and indeed the French campaign afterwards, was American General Dwight D. Eisenhower.