Attalus I

Attalus I (Ancient Greek: Ἄτταλος 'Attalos'), surnamed Soter (Greek: Σωτήρ, 'Savior'; 269–197 BC), was the ruler of the Greek polis of Pergamon (modern-day Bergama, Turkey) and the larger Pergamene Kingdom from 241 BC to 197 BC. He was the adopted son of King Eumenes I, whom he succeeded, and the first of the Attalid dynasty to assume the title of king, sometime around 240 to 235 BC. He was the son of Attalus and his wife Antiochis.

Attalus won an important victory, the Battle of the Caecus River, over the Galatians, a group of migratory Celtic tribes from Thrace, who had been plundering and exacting tribute throughout most of Asia Minor for more than a generation. The victory was celebrated with a triumphal monument at Pergamon (The Dying Gaul) and Attalus taking the surname "Soter" and the title of king. He participated in the first and second Macedonian Wars against Philip V of Macedon as a loyal ally of the Roman Republic, although Pergamene participation was ultimately rather minor in these wars. He conducted numerous naval operations throughout the Aegean, gained the island of Aegina for Pergamon during the first war and Andros during the second, twice narrowly escaping capture at the hands of Philip V. During his reign, Pergamon also repeatedly struggled with the neighboring Seleucid Empire to the east, resulting in both successes and setbacks.