Today, Rojava does that. I know it's an unrecognised state that didn't even formally declare independence (and currently threatened with total destruction by Turkey) but they do that.

They have an actual radical feminist ideology there, especially radical since they're in a ME Muslim country. But even they keep them strictly separated, in their own units, in their own armed force (YPJ).

They also recruit (conscript) child soldiers, which is way more normal, for both the region/culture and rebel armies generally.