Battle of Magnesia
Battle of Magnesia is the name of a battle fought in late 190 BC near Magnesia ad Sipylum in Lydia, between the forces of the Roman Republic under the nominal command of the consul [Lucius Cornelius Scipio Asiaticus|Scipio Asiaticus]] but in effect commanded by his brother, Scipio Africanus and the army of the Seleucid Empire under Antiochus III. Our information about the battle is mainly drawn from Livy (37, 37-44) and Appian (Syrian wars 30-36).
The battle ended with a defeat to Antiochus, and further undermind the position of the Seleucid empire in Asia minor in favour of the Romans. Two years later Antiochus was forced to sign the Treaty of Apenea, ceding a significant part of Asia minor and agreeing to pay a hefty tribute to the Romans.