'Footmen' in the Bible

For he left to Jehoahaz of the army not more than fifty horsemen and ten chariots and 10,000 footmen, for the king of Aram had destroyed them and made them like the dust at threshing.

“If you have run with footmen and they have tired you out,Then how can you compete with horses?If you fall down in a land of peace,How will you do in the thicket of the Jordan?