The army committed about 75% of its forces (~11 million by war's end) to Europe and the Mediterranean, but that included a lot of non-combat personnel. The Navy and Marines, about ~4.5 million together, were the main fighting bodies in the pacific, and as any drunk Marine in a pool hall will happily tell you, they're all riflemen first and foremost. Same goes for Navy crews, they were all of them basically in combat or combat support roles.
The army committed about 75% of its forces (~11 million by war's end) to Europe and the Mediterranean, but that included a lot of non-combat personnel. The Navy and Marines, about ~4.5 million together, were the main fighting bodies in the pacific, and as any drunk Marine in a pool hall will happily tell you, they're all riflemen first and foremost. Same goes for Navy crews, they were all of them basically in combat or combat support roles.