The Army did all that through two World wars.
I think xzins remark about ground support describes what is left to the Army and what it needs from the air, but the great Strategic bombings, the carrier use for heavy bombers, the first nuclear war, missile development, the great wars fought by our air forces, was done when they were Army.
Oh, I understand what he was saying, I just disagree. The Army Air Corps/Forces that existed in WWII were actually very independent already. They were NOTHING like the Army Air Service of 1917-18. Not even close. They were for all intents and purposes, a separate service in all but name.