Antiochus III of Syria was decisively defeated by the Romans allied with king Eumenes II of Pergamum.
Citation:
Bouchard, Elsa. "Battle of Magnesia".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11364, accessed 24 May 2013.]