During the Trojan War the Greeks attacked Pergamum, either because they mistook it for Troy, or because an alliance existed between Troy and Pergamum. Hiera was apparently an Amazon, and the Amazons united with the defenders of Pergamum to repel the attack. However, in the battle Hiera was killed by the Greek warrior Nireus. Telephus was so grief-stricken that he called a cease-fire to hold the funeral for Hiera, before restarting the battle and finally driving the invaders away.