The elevation of the new emperor led to an influx of volunteers from Byzantine Anatolia to fight the Normans .
The fall of Thessalonica and the Norman advance towards Constantinople precipitated the downfall of the Byzantine emperor Andronikos I Komnenos and the elevation of Isaac II Angelos .
The elevation of the new emperor led to an influx of volunteers from Byzantine Anatolia to fight the Norman .
The fall of Thessalonica and the Norman advance towards Constantinople precipitated the downfall of the Byzantine emperor Andronikos I Komnenos and the elevation of Isaac II Angelos .