But the ranks of Caesar's cohorts were thin.

The numbers were scarce half as many as in those of the foe.

And to confront Labienus and his cavalry Caesar had but one thousand horse.

His army stood in three lines, facing the enemy's infantry; but, though it weakened his own legions dangerously, there was but one thing to do, unless Labienus was to force around the flank, and sweep all before him.

Six cohorts Caesar stationed at the rear of his right wing, a defence against the hostile cavalry.