Meanwhile Cassander had died shortly before the siege of Athens, and was succeeded on the throne of Macedon by his eldest son, Philip IV. [Philip Arrhidaeus is called Philip III.] But that young prince died in 295, and the succession was disputed between his two brothers, Antipater and Alexander. Demetrius availed himself of the distracted state of Macedonia to make himself master of that country (B.C. 294). He reigned over Macedonia, and the greater part of Greece, about seven years. He aimed at recovering the whole of his father's dominions in Asia; but before he was ready to take the field, his adversaries, alarmed at his preparations, determined to forestall him. In the spring of B.C. 287 Ptolemy sent a powerful fleet against Greece, while Pyrrhus on the one side and Lysimachus on the other simultaneously invaded Macedonia. Demetrius had completely alienated his own subjects by his proud and haughty bearing, and by his lavish expenditure on his own luxuries; while Pyrrhus by his generosity, affability, and daring courage, had become the hero of the Macedonians, who looked upon him as a second Alexander. The appearance of Pyrrhus was the signal for revolt: the Macedonian troops flocked to his standard and Demetrius was compelled to fly. Pyrrhus now ascended the throne of Macedonia; but his reign was of brief duration; and at the end of seven months he was in turn driven out by Lysimachus. Demetrius made several attempts to regain his power in Greece, and then set sail for Asia, where he successively endeavoured to establish himself in the territories of Lysimachus, and of his son-in-law Seleucus. Falling at length into the hands of the latter, he was kept in a kind of magnificent captivity in a royal residence in Syria; where, in 283, at the early age of 55, his chequered career was brought to a close, partly by chagrin, and partly by the sensual indulgences with which he endeavoured to divert it.