Complex sentence: After this they succeeded at the siege of Anchialos, with the support of a fleet manned by Slavic auxiliaries, they then started and quickly abandoned the sieges of Drizipera and Tzurullon.
Split into simpler sentences: After this they succeeded at the siege of Anchialos, with the support of a fleet manned by Slavic auxiliaries. They then started and quickly abandoned the sieges of Drizipera and Tzurullon.