Philopoemen (18.5-18.6)

but the five hundred men who were guarding the open country of Messene suddenly attacked them, and when those who had before been worsted saw this, they collected together along the hills. Then Philopoemen, fearing that he would be enveloped, and trying to spare his horsemen, withdrew over difficult ground, bringing up the rear himself and frequently riding out against the enemy, and trying to draw their attacks entirely upon himself. They did not venture, however, to return his attacks, but merely shouted and threatened his flanks.

Withdrawing from the line frequently, then, to spare his young men, and sending them one by one into safety, before he was aware of it he was left alone among numerous enemies. Even then no one ventured to come to close quarters with him, but he was pelted with missiles from a distance and forced upon rocky and precipitous places, so that he had difficulty in managing his horse and kept tearing him with the spur.