"That a force of such size should move through the land, driving all before them and yet..." He paused, seeking the words.

We may very well have a hostile force of unknown size on our flank, and no forces on this side but us.

The Marines engaged a communist force of unknown size in heavy combat.

Less is known about Yaroslav's army, but it is assumed that he managed to collect a force of similar size.

A classic encounter battle, the action had been fought between two forces of roughly equal size in the heavy monsoon rain at close quarters.

She was on her own, not lost, but getting there, preparing for a face-off with a force of unknown size and capability.

Some narrators say that he could even rout a big force of multiple size with handful of his followers.

Their military has always demonstrated more courage than almost any other and to my knowledge has never lost a battle against a force of equal size.

But it wasn't smart to use up a tachyon rocket against a single Tauran, not with another force of unknown size only a few minutes away.

Since there was none in the Mediterranean, a force of comparable size would have to be improvised.