Thus the fortress must be taken before a gun or a waggon could move.
No nation can longer be a fortress, lone and strong and safe.
It was like trying to storm a medieval fortress with a popgun.
Distant view of the city of Cuzco and of the Sacsahuaman hill, crowned by the fortress.
The fortress of the future will probably be in the nature of an intrenched camp.
But in time of war all the people had flocked into the fortress.
The walls of the keep were not the only protection of the fortress.
The Edwardian castles of Caernarvon and Beaumaris belong to this type of fortress.
In Cornelius's cell one heard the chimes of the clock of the fortress.
We went, and walked in silence to and fro along the rampart of the fortress.