Teres, who is claimed to have lived 92 years, had died by the outbreak of the Peloponnesian war in 431. His successor was his son Sitacles, whose reign is mostly known thanks to the account of Thucydides. Before the war he is known to have campaigned against the Paeonians in the west, subjugating some of the tribes living along the upper reaches of the Strymon. Now, his influence extended over much of Bulgaria, Greek and Turkish Thrace and also parts of southeastern Romania: from the Styrmon and Iskar rivers in the west to the Black Sea and the Propontis in the east as well as the Haemus and the mouth of the Danube (which was ruled by the tributary Getae) in the north. According to Thucydides, the Odrysian state was "very powerful, and in revenue and general prosperity exceeded all the nations of Europe which lie between the Ionian Sea and the Euxine Sea."