Attalid dynasty
The kingdom of Pergamon under the Attalid dynasty was an independent kingdom established after the rule of Philetaerus by his nephew Eumenes I. Eumenes enlarged Pergamon to include parts of Mysia and Aeolis, and held tightly onto the ports of Elaia and Pitane. Attalus I, successor of Eumenes I, remained active outside of the boundaries of Pergamon. He refused protection payment to the Galatians and won a fight against them in 230 BCE, and then defeated Antiochus Hierax three years later in order to secure nominal control over Anatolia under the Seleucids. The victory was not to last as Seleucus III reestablished control of his empire, but Attalus was allowed to retain control of former territories of Pergamon.