There is a theory that Russia is a land power, and the US is a naval power. So, I doubt a direct US-Russia War, either on land or sea, will happen. You might find the post below interesting:
Whoever Controls Eurasia Controls the World
Armored Personnel Carriers & Infantry Fighting Vehicles
Main Battle Tanks and Armour Technology
T-14 Armata
Tank Guns and Ammunition
Is the tank becoming obsolete?
Influential US Army Reform Advocate Claims a Russian Tank Brigade Would ‘Annihilate’ Its US Counterpart
A retired former officer favored by ex-Defense Secretary Donald Rumsfeld and with outsized influence among officers argues US Army formations have too much tail, too little bite to prevail...