I think forts are only good in certain places. The amphib defense mentioned above is one. I have a chance to put a couple to good use in my current game.
Egypt is to the north/central, I am to the east, and England is to the south/west of the continent. Egypt's border extends throughout the middle of the continent north and south down to a handful of squares away from the southernmost point of the continent. England has two cities kind of wedged in south of Egypt and I...so England's cities are arranged in sort of a golf club fashion, with Egypt north of the club head and me meeting Egypt's line and extending East.
I culture bombed near the westernmost of my empire and that cut off those two cities from the rest of England. Right now, I'm going to build a fort behind the two cities, fortify it--cutting off reinforcements from England unless they sign an open border with Egypt--then will quickly destroy those two. Then, I will probably just seek to declare peace, continuing to use the fort as my choke point to keep them from pillaging.
All of this because there is no way to destroy a city once you cause it to culture flip.
Egypt is to the north/central, I am to the east, and England is to the south/west of the continent. Egypt's border extends throughout the middle of the continent north and south down to a handful of squares away from the southernmost point of the continent. England has two cities kind of wedged in south of Egypt and I...so England's cities are arranged in sort of a golf club fashion, with Egypt north of the club head and me meeting Egypt's line and extending East.
I culture bombed near the westernmost of my empire and that cut off those two cities from the rest of England. Right now, I'm going to build a fort behind the two cities, fortify it--cutting off reinforcements from England unless they sign an open border with Egypt--then will quickly destroy those two. Then, I will probably just seek to declare peace, continuing to use the fort as my choke point to keep them from pillaging.
All of this because there is no way to destroy a city once you cause it to culture flip.