cant wait for holland class! these boats were purchased by all allied nations in ww1, we had too in italy, purchased in 1917 and used in adriatic against the austro ungarian fleet, and in lybia against german/turkish forces (austrogerman uboots did transport supplies and turkish military advisors for lybian rebels engaged against british/italian forces in egypt lybian border) and in ww2 they still in service for 2nd line duties, mainly costal patrols and sub school duties.
cant wait to play them. AG CLASS is one of my favourite soviet sub!
btw she shchuka class x serie, (not the x bis, only the x) have a probleb: cant load other torpedoes in the tubes, only the standard 533 and 450, if you load other types, and start patrol, you ll find the standard 533 and 450 anycase loaded in the tubes.
Will be nice also a ww1 russian mod in the baltic or black sea, with the tsarist submarine fleet, or with the british baltic flotilla, submarines took part also in the civil war later.