I wonder if anyone remembers Desert Storm.
It took 6 months to build up the forces that were needed to move into Kuwait and expel Iraq's invasion forces. Without having bases in the region it never would have happened. You need a foothold next to the places you intend to move into before you even attempt to commit troops. If we brought everyone home it would take over a month to move the troops to where they were needed. You still have to use ships to transport the mechanized forces needed to do the heavy lifting.
Good. Then our politicians would put a lot more thought into whether to declare war (sorry, "authorize the use of force") on other nations for borderline reasons.
Can we rely on anyone else to do this? Can they even afford it? No.
Why? Because their funds are mostly wrapped up in entitlements and infrastructure, not defense.
Did you really think that through?
Is the role of America's military is now supposed to be propping up the welfare states of the rest of the world?
Seriously?