Why would they bother to build a new fortress at all?

A new fortress was built by the Dutch in 1818 at the same strategic location above the town.

The new fortress was built between 1763 and 1783.

If the rear of the line came under threat they would withdraw, in order, to the new fortress.

This new fortress became the starting point of the campaign against the Ottomans.

A new fortress was established by the Portuguese in the following century.

These horses have to be returned to the new fortress.

I stumbled into a parade of big ones at my new fortress.

As you know, construction of the new fortress has just been completed.

Later a new fortress was built by royal forces to guard the southern frontier.