Complex sentence: Cassander married Philip II's daughter Thessalonike, inducting him into the Argead dynastic house, and briefly extended Macedonian control into Illyria as far as Epidamnos, although by 313 BC, it was retaken by the Illyrian king Glaucias of Taulanti.
Split into simpler sentences: Cassander married Philip II's daughter Thessalonike and briefly extended Macedonian control into Illyria as far as Epidamnos. However, by 313 BC it was retaken by the Illyrian king Glaucias of Taulanti.