u/Alerion23

I basically just conquered 2 cities + the capital and offered peace to the civ i won over which they accepted, right after that, the loyalty of all the captured cities went positive (full loyalty in 20 moves), I also have a unit garrisoned in each of the cities. But the thing is right when I moved my most powerful unit (tank, which was one hex near the capital, it was not even garrisoned there) loyalty drops significantly, it literally says now that in few moves the city will revolt. Does anyone know what causes this?

I had one completed factory in my capital, then I started connecting my cities by railroads and then realized that for some reason I could no longer build power plants in the city.

After a bit of googling I found out that apparently once I start building railroads I have to connect all the cities to the capital to start building factories, but the thing is that I have cities on 3 different islands, how do I connect the cities on other islands with the capital? One island is especially close to the city, like few tiles away.

It says I am accumulating 3 coal from improvement, the thing is that there is no coal in my civilization, does anyone know where else could you get coal from?