The Sasanians , however , had neglected to cover the bridge .
Heraclius charged across with the rearguard , unafraid of the arrows that the Sasanians fired , turning the tide of battle against the Sasanians .
The Sasanians , however , had neglected to cover the bridge , and Heraclius charged across with the rearguard , unafraid of the arrows that the Sasanians fired , turning the tide of battle against the Sasanians .