Why Didn't Sexter Just Join The Army?

Serious question. Lots of targets, he could use excessive force and nobody would try him (Western countries rarely try their war criminals you can go ahead and check the stats they typically get out on bail at most).

Yes, I'm aware that the pay would be rancid, as well as the possibility of dying, but hear me out.

Sexter could work his way up. He could've become a sergeant, or an admiral or whatever the hell ranks they got.

Plus the odds of dying in the US military are significantly lower than in other countries. Biggest budget of the world and all. Not that that says everything, but looking at Dexter's expertise, yeah he'd probably make it out.