Again, according to rumors, the USSR does not have a fleet? However, like Russian localization? It seems to me that your game in the Russian-speaking segment of the Internet is popular, in the game, I think, you can teach the history of the Great Patriotic War.
Maybe you are not aware that during the war years the fleet played a significant role, including the Northern Fleet, which defended convoys delivering arms under Lend-Lease. I don’t know if there are significant studies in English on the topic of the war in the East, in the USSR in 1960 there was a 6-volume collection of the Ministry of Defense on the topic of war, then there was a 12-volume volume on the history of the second imperialist war, it is much smoother, but it describes all theaters military operations.
Maybe such literature is not available in your public domain? Or is there more of a technical implementation problem?