[rjsw]

The UK built [1] castles in Afghanistan recently too.

[1] https://en.wikipedia.org/wiki/Hesco_bastion

[pigpop]

More of a Roman fort I'd say.

[rjsw]

Or an early Norman one, for the same reasons. The people in the fort were different to those outside, city walls were built later in the medieval period once those differences had reduced.