That interpretation of WWII seems a bit skew-whiff to me....
Russia was Nazi Germany’s main focus throughout the entirety of the war following the start of Operation Barbarossa (taking up approximately 80% of it’s resources), Italy didn’t join the allies until 1943, Romania was not on the allied side until towards the end when they joined the Soviets, and the war on the ‘Western Front’ was not just fought on French and Belgian soil, it was also fought in Holland, Denmark, Norway and latterly, Germany as well (also Greece if you count the fact that the British fought there as it being part of the ‘Western Front’....)
I can see why that would be, since this topic is about something that happened in WWI.