It reflects the fact that in American consciousness, WW2 was Pear Harbor, Midway, the Bulge and Normandy. Most of Avalanche's buyers grew up with that mindset. A pity.
There is so much British/Commonwealth and Pacific/Asian mainland that has not been represented.
Its even possible that we don't see Torch/Kasserine because fighting the French has always been in poor taste, and the U.S. forces were soundly thrashed at Kasserine.