Battle of Ecbatana

Sidetes' campaign initially met with spectacular success, recapturing Mesopotamia, Babylonia, and Media. In the winter of 130/129 BC, his army was scattered in winter quarters throughout Media and Persis when the Parthian king, Phraates II, counter-attacked. Moving to intercept the Parthians with only the troops at his immediate disposal, he was ambushed and killed at the Battle of Ecbatana in 129 BC. Antiochus Sidetes is sometimes called the last great Seleucid king.