In the last years of the 3rd century, Macedonia under king Philip V began a renewed expansion to the east, exploiting the weakness of the Ptolemies after the death of Ptolemy IV. While Philip's initial focus was on coastal Thrace, he also led a campaign into the interior. Temporarily losing his Thracian holdings after the end of the Second Macedonian War in 197, he reconquered most of them a decade later, while again campaigning in the Thracian interior. In 184 or 183 he pushed into the plains of the upper Hebros, defeated the Odrysians and other local tribes and conquered Philipopolis, although the Odrysians reconquered the town soon afterwards. It may be noteworthy that no Odrysian king is mentioned. While in 181, Philip was still climbing the Haemus in northern Thrace, his Thracian empire collapsed with his death two years later.