The course of succession among the Macedonian princes seems not to have been settled, so that disputes and bloodshed took place at the death of several of them. Moreover, there were distinct tribes of Macedonians, who, though forming part, really or nominally, of the dominion of the Temenid princes, nevertheless were immediately subject to separate but subordinate princes of their own. The reign of Perdikkas had been troubled in this manner. In the first instance, he had stripped his own brother Alketas of the crown,[109] who appears (so far as we can make out) to have had the better right to it; next he had also expelled his younger brother Philippus from his subordinate principality. To restore Amyntas the son of Philippus, was one of the purposes of the Thrakian prince Sitalkês, in the expedition undertaken conjointly with Athens, during the second year of the Peloponnesian war.[110] On the death of Perdikkas (about 413 B.C.), his eldest or only legitimate son was a child of seven years old; but his natural son[111] Archelaus was of mature age and unscrupulous ambition. The dethroned Alketas was yet alive, and had now considerable chance of reëstablishing himself on the throne; Archelaus, inviting him and his son under pretence that he would himself bring about their reëstablishment, slew them both amidst the intoxication of a banquet. He next despatched the boy, his legitimate brother, by suffocating him in a well; and through these crimes made himself king. His government, however, was so energetic and able, that Macedonia reached a degree of military power such as none of his predecessors had ever possessed. His troops, military equipments, and fortified places, were much increased in numbers; while he also cut straight roads of communication between the various portions of his territory,—a novelty seemingly everywhere, at that time.[112] Besides such improved organization (which unfortunately we are not permitted to know in detail), Archelaus founded a splendid periodical Olympic festival, in honor of the Olympian Zeus and the Muses,[113] and maintained correspondence with the poets and philosophers of Athens. He prevailed upon the tragic poets Euripides and Agathon, as well as the epic poet Chœrilus, to visit him in Macedonia, where Euripides especially was treated with distinguished favor and munificence,[114] remaining there until his death in 406 or 405 B.C. Archelaus also invited Sokrates, who declined the invitation,—and appears to have shown some favor to Plato.[115] He perished in the same year as Sokrates (399 B.C.), by a violent death; two Thessalian youths, Krateuas and Hellanokrates, together with a Macedonian named Dekamnichus, being his assassins during a hunting-party. The first two were youths to whom he was strongly attached, but whose dignity he had wounded by insulting treatment and non-performance of promises; the third was a Macedonian, who, for having made an offensive remark upon the bad breath of Euripides, had