Not necessary. The Reagan era buildup proved we can have a military about twice the size of today’s w/o a draft. It’s just a question of how much money we’re willing to spend.
It might be up to some of us older guys to get back in. I’m 40 did about 6 years in the Corps, my kids are six y/o and under. If they are going to have a future its gonna be up to US. I see no help coming from our allies. The birth rates in Europe are horrendous. The U.S. may have to allow polygamy. Imagine the headaches of more than one wife! Just kidding ladies.