Armies: Troops often Hired For
Source: TTT
1 Chronicles 19:7
So they hired for themselves thirty-two thousand chariots, as well as the king of Maacah with his troops, who came and camped near Medeba while the Ammonites came from their cities and marched out for battle.
2 Chronicles 25:6
He also hired 100,000 mighty warriors from Israel for a hundred talents of silver.