No chance in the short term, really. There's a lot of old hardware running around on reserve bases, and thats at least! All those turbines run avgas or something like diesel, not much of an aircraft person but I can't say for certain. It would certainly be a great challenge to replace all those turbines, and its not just the fuel.
The synthetics have different properties, and it might be the case that all the rubber dissolves on your Sikorsky, fuel liners disappear out of the exhaust, and hopefully whatever whiz-bang alloys we've been producing hold up. Who's to say, it's probably classified.
Imagine telling your people they're gonna lose the battle tested and well supplied turbines and power plants all over all the forces with something conceptually new. Large naval vessels and submarines can at least run nuclear, but there isn't yet a reactor small enough for a gunboat or a helicopter afiak.
Plus, can you imagine the battlefield hazards that would create? Suddenly, it looks to my eyes like a lot fewer people getting rescued when your reactor takes some HEAT and goes supercritical.
Luckily we can try the batteries or whatever out in out cars and lawnmowers first, as a handy side effect developing the currently-nonexistent alternative infrastructure. It wouldn't really be too unreasonable to consider EV and alternative fuels a national security priority, but good luck with that, I say to myself.