What did antiochus III do?

Antiochus III, also known as Antiochus the Great, was a Seleucid king who ruled from 222 to 187 BCE. He expanded his empire significantly through military campaigns, reclaiming territories in the Near East and Asia Minor. His reign saw both cultural and economic development, as well as conflicts with Rome and the Ptolemaic Kingdom of Egypt. Ultimately, his ambitions led to a series of wars that weakened the Seleucid Empire and set the stage for its decline.