Gladiator Fun Fact

Spartacus made his prisoners fight as gladiators to amuse the ex-gladiators in his army.

from "100 Facts about Gladiators" by Rupert Matthews. 

http://www.amazon.co.uk/Gladiators-100-Facts/dp/1842368788/ref=sr_1_1?ie=UTF8&qid=1387446468&sr=8-1&keywords=gladiator+rupert+matthews