When exactly are capitals flipped and cities or forts removed?
A city is removed from play when an army belonging to any player enters that land. A capital is flipped and becomes a city when any army occupies the land. A fort is removed only as the result of combat. Note, however, that having an Empire, Minor Empire, or Kingdom arise in a land is treated the same as if the new army had won all necessary combats to advance into that land. The same is true of an army advancing into a land held by armies of the same color.
