Magnesia (War with Antiochus the Great).
Fought B.C. 190, between Antiochus the Great, with 80,000 troops, and the Romans, 40,000 strong, under Cnæus Domitius. Antiochus, leading the right wing, drove back the Roman left and penetrated to their camp, which he nearly succeeded in capturing. His left wing, however, was routed, and his elephants becoming unmanageable, broke the ranks of the phalanx, whereupon his whole army fled in confusion, with a loss, it is said, of 50,000 killed. The Romans lost 300 only.