How is city defense calculated?

[danhynes]

I am not sure what happened in my present game. I am trying to see what would happen if I didn't build a military. I am playing a game on prince and at turn 200 I am pretty much tied for science, but all of my cities have really low defense. My capital is showing a defense of 21 and I built ancient and medieval walls there. My other cities are at 14. By comparison the AI cities are around 50 defense. I know generally science somehow comes into play, but was wondering what else comes into play. I haven't run into this issue before so I am not sure why my cities aren't higher this game like they usually are.

 

[antimony]

http://civilization.wikia.com/wiki/City_Combat_(Civ6)

The number you see next to the shield is the combat strength of the city:
"a Combat Strength stat, which is equal to that of the strongest melee unit your civilization currently possesses minus 10, or to the unit which is garrisoned inside the city (whichever is greater)."

And note that it differs from the city attack strength:
"Once they have at least Ancient Walls, any city and its corresponding Encampment district gain a ranged strike with Ranged Strength equal to that of the strongest unit your civilization possesses."

 

[danhynes]

Thanks. I did not know a few things in that article. Im not sure what type of bug I ran into, but my cities for some reason have a ranged attack of 3 even though I have a musketman in my army. Also I can't build beyond ancient walls in a couple of my cities but I can in others.

I read somewhere else the ranged attack equals the largest ranged unit you have (I assumed it was any unit). I didn't build any ranged units so that is probably why. I will go build one and see if it fixes it.

Just built one, that fixed my problem with the ranged strength. Still not sure why a few of my cities can't upgrade walls though.

 

[Browd]

If the walls are damaged (even slightly) they have to be repaired before you can build the next generation of walls.

 

[Victoria]

Range strength equals the strongest range unit in your army OR navy

Defence strength equals the strongest melee unit in your army or navy as @antimony said but also

+4 per district
+3 in the capital for a palace guard
+4 (or more) for having walls
+x difficulty bonus
+3,(I think) for being on a hill

 

[Kinestic]

What does this mean with GG/GA? I noticed recently that they do not act like modifiers such as promotions/flanking/damaged units, but instead directly increase the base strength of the unit.

 

[Victoria]

GG Great General
GA Great Admiral

If you look in the combat box bottom right of screen it will say

X base strength
+x for great general

So is is a modifier, not base strength

 

[Kinestic]

My apologies, I had noticed that it with the Great Admiral it didn't show up in that area when attacking a city, but the bonus was still in the final combat strength and thought it was this way for everything. I probably should have checked for with more thing.

 

[Victoria]

It does show up, Have a look at this, 2 great admirals I had stacking last night. When there are too many modifiers it flicks between screens

Great general stacking.