Jonathan Clayden's "Organic Chemistry" is probably the best organic textbook I have ever read. It helped me a lot when I was first learning and I still flick back to it
An interesting game that addresses a very similar conflict is Combat Mission:Black Seas [1]. This simulates a hypothetical 2011 conflict between Ukraine and Russia. This game was made before the 2014 invasion. Versions of the game are used to train officers in the British Army. A youtuber, Usually Hapless [2] covers a lot of combined arms warfare stuff on his channel using Combat Mission as a base. It's worth looking at.