abstract:The Battle of Magnesia was the concluding battle of the Roman–Syrian War, fought in 190 BC near Magnesia ad Sipylum on the plains of Lydia (modern Turkey) between Romans, led by the consul Lucius Cornelius Scipio and his brother, the famed general Scipio Africanus, with their ally Eumenes II of Pergamum, and the army of Antiochus III the Great of the Seleucid Empire. The resulting decisive Roman victory resulted in Roman domination over the internal affairs of a large part of the territory once controlled by the Seleucid Empire.