In our timeline, quite a number of countries had their own separate air force well before WW2. Many countries saw the advantage of a branch of military where it's sole purpose was air power. What if General Billy Mitchell pushed even harder for air power when he was made Director of Military Aeronatutics.
It was no secret that General Mitchell, starting in WW1 would alienate his fellow officers and then later members of the senate and more particularly, the Navy.
However, rather than alienating anyone who can help him, he tried his best to work with congress and the Navy, hopefully eliminating the events that created his downfall.
Is it possible that he could have created a completely separate branch by say 1925?
If this were to happen, what actions would it take for the Navy's carrier fleet be removed from the Navy and placed under this separate branch?