I've been interested in the #SecondWorldWar since I was a child, and I've been playing #RPGs for over thirty years. This year, I finally combined the two when I released Setting Europe Ablaze, by sourcebook for RPG campaigns featuring SOE agents.
It's a military setting without strict rank structures, and where female characters aren't anachronistic. There's a lot of flexibility, and campaigns can be as serious or silly as the group wants.
https://russellphillips.uk/books/setting-europe-ablaze/