Its formidable defences and strategic location caused it to become known as the Gibraltar of the North.

Through its formidable defences it became known as the Gibraltar of the North.

In any event, we had left our big robot brain and its formidable defences behind.

The plotting system was quickly proven and was a formidable defence with few weaknesses.

What were supposed to be formidable defences were reduced to a small number of guns and soldiers to man them.

He was part of a formidable defence used in the teams continental truimph and treble-trophy season that year.

These spines provide formidable defences, and when erected they can usually be locked in place or are venomous.

Despite its formidable defence, the stonefish does have predators.

However the man or men who had put up such a formidable defence seemed to have vanished in thin air.

It was highly suitable for raiding, however, and with experienced marksmen on board could mount a formidable defence against small craft.