In 1047 Constantine was faced by the rebellion of his nephew Leo Tornikios, who gathered supporters in Adrianople and was proclaimed emperor by the army. Tornikios was forced to retreat, failed in another siege, and was captured during his flight. The revolt had weakened Byzantine defenses in the Balkans, and in 1048 the area was raided by the Pechenegs, who continued to plunder it for the next five years. The emperor's efforts to contain the enemy through diplomacy merely exacerbated the situation, as rival Pecheneg leaders clashed on Byzantine ground, and Pecheneg settlers were allowed to live in compact settlement in the Balkans, making it difficult to suppress their rebellion.