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As the commander of a battalion of the Macedonian phalanx (heavy infantry), Perdiccas distinguished himself during the conquest of Thebes (335 BC), where he was severely wounded. Subsequently, he held an important command in the Indian campaigns of Alexander. In 324 BC, at the nuptials celebrated at Susa, Perdiccas married the daughter of the satrap of Media, a Persian named Atropates. When Hephaestion unexpectedly died the same year, Perdiccas was appointed his successor as commander of the Companion cavalry and "chiliarch". As Alexander lay dying on 11 June 323 BC, he gave his ring to Perdiccas.