If you stick around long enough, the AI will have lots and lots of Nuclear Submarine Armada's. Even one Nuclear Submarine is a serious threat to an Armada of Missile Cruisers. I understand that they are upgrades of the Privateer's formally used for pillaging and attacking land units, but how does it make sense for Submarines to attack units on land? Also, they can't go under ice anymore, and Helicopters can't go over mountains. That makes me not want to use them. Esp the Helicopter, as all Aluminum goes to planes leaving Oil for Tanks and Artillery. Remember in Civilization 5, how the Battleships and Missile Cruisers were kings of the sea? They barely do any damage to late game cities, They detect Subarmines but can't deal with them at all. Their basically nothing more then an Anti-Air and Submarine Detectors, and I don't see the point of ever having more then one in a Navy. Compared to Planes, Nukes, and Death Robots, they are absolute garbage. They aren't even worth using in Water Heavy Games, compared to Aircraft Carriers and a Destroyer to capture. (Although it takes like 20 Jet Bombers to beat down a late game city, the bombers are nothing more then nuclear delivery systems, which the Subs can also do just as well.) Even if Submarines weren't all that in Civ5, Subs are invisible and carry nukes. That alone is enough to make them very useful, especially when fighting other players. They are faster and invisible compared to aircraft carriers, and being able to move under ice, had greater access for unleashing nukes. I actually designed a few maps for Civ5, very cold worlds full of ice, where Subs were extremely useful. But I guess they have to be this way. All of your good privateers become subs, and the problem in Civ5 was that if you promoted to Subs, you lost their coastal raiding and pillaging abilities. I don't mind their coastal raiding, but at least if they could not attack land units, Missile Cruisers would actually be worth using. How am I getting just seeing this now? Because it's my first game playing after the year 2000 in "One More Turn" Sure Missile Crusiers are great if you intend to conquer the world the moment you discover them. But if you give the AI enough time to actually become competent and make good units, you begin to see the truth about how much they really suck. TLDR - Nuclear Submarines are ridiculously overpowered, Missile Cruisers totally suck and aren't worth using except to detect subs. Imagine if Anti-Cavalry were twice as strong against Cavalry and also got to be invisible like a fully promoted Special Ops unit, that's about how bad it is when a Missile Cruiser goes up against a Nuclear Submarine. They have the ability to detect them, but not actually contend with them. Just design choice. /sarcasm. (P.S. this not the German Uboat, just Subs from every Civ in my game) BTW: Why was I able to build an Aircraft Carrier Fleet, but CANNOT join it together with a regular one to make an Armada? I can build the Armada's directly but can't join them together. This game and it's inconsistent rules gets me every time. Civilization 6 is essentially the hot bimbo of gaming. It thinks because it looks pretty and sounds pretty that it can get away with sucking. BTW I had a Missle Crusier Armada brush up against a lone Roman Nuclear Sub Armada. But since the AI worships the player, though I was at war With Rome and in their lands, the sub left when it would've brought me down into red with one attack. Me, not willing to accept the babyish patronizing, deleted the Missile Cruiser on the very next turn.