Speaking of WWI - “The Lost Battalion”. I LOVE this movie. And that it is based on a true story makes it better. IIRC one of the pigeons is in the Smithsonian or somewhere.
https://www.youtube.com/watch?v=PyJwtC8kwJM
A second on “Lost Battalion” (WWI - 1 Battalion vs an entire German Army) and add “Enemy at the Gates (WWII - Russia).”