I don't think volunteering to fight in warzones is compatible with being a parent, but it's also not something relevant to the experience of almost any person here :) The number of people who choose to do things like that is small.

Most hobbies and goals are compatible with being a parent. Yours are not. If anybody else here reads this from a warzone they've entered voluntarily, don't take my comments above as relevant to you :)

It sounds like you're struggling quite a bit with the change of pace. I know a couple of people who have voluntarily fought in foreign warzones and travelled conflict areas, and neither are coping well with being home in the mundane. I hope you can find something that helps. Therapy might if you can find somebody good.