I came across a new game as I was surfing the web for photos of Normandy for my map... It's called Hell Let Loose, and described as "a platoon-based realistic multiplayer first-person shooter for PC set during the Second World War".
Gameplay:
https://www.youtube.com/watch?v=LYK7W0lM8uE
https://www.youtube.com/watch?v=k78Xq4veXTk
I think it looks interesting so far. I occasionally like to play Squad (a modern counterpart) and this feels a lot like it.
Small squads with up to 100 players per server, and includes vehicles and artillery.