The outer works were taken, and their defenders driven back to add to the confusion in the main fort.

Besides the main fort the remains of various ancient structures can be seen here.

The main fort was attacked by infantry on the night of the 17th.

Two casemates in the main fort were planned to provide indirect fire.

The initial plans called for five main forts and two medium ones to be constructed.

The main fort, however, had to be taken by storm and hand-to-hand combat.

"For now, though, let's get back to the main fort before somebody starts getting curious about where we are."

It was the main fort in that system, and was among the first elements to be constructed.

One can see the remains of the main fort and the prisons of that time.

Then the major assault took place on the main Chinese forts.