The army went into camp and built winter quarters in Centreville which were protected by strong fortifications.

During this period the number of piliakalniai in use decreased, but those that remained had stronger fortifications.

The proliferation of firearms and canon made stronger fortifications necessary.

Germany has likewise built strong fortifications in the east.

Moreover, in this period Isfahan was a military centre with strong fortifications.

A haut-consort's skirts made a stronger fortification behind which to hide than Miles would have thought possible, a few weeks ago.

The site was a strong fortification of considerable strategic importance.

In times of war, the circular rampart was a strong fortification against enemies.

The post was considered one of the strongest fortifications built in that period.

As a result resistance was inconsistent and despite Cayenne's strong fortifications, the territory fell within a week.