Can you recommend me a romance book set during a war (or there’s a war, even tho is not the main focus) with a happy ending?

I love angsty tragedy romance but I'm tired of sad ending. I've been reading the Poppy War but I'm not enjoying it.

It's been too long since I read a book and I don't remember what book with this genre I have read beside Erha & The Song of Achilles.

Thank you!