Who replaced the Macedonia king?

After the death of King Alexander the great in 323 BC, his empire was left without a clear successor. His half-brother, Philip III Arrhidaeus, was proclaimed king but was largely a figurehead, as he was mentally disabled. The real power was held by a series of regents and military leaders, most notably the general Perdiccas, who initially governed the vast territories of Alexander's empire. Eventually, the empire fragmented into several Hellenistic kingdoms ruled by various successors, known as the Diadochi.