Not much about him really. In the spring of 216BC, Hannibal was camped in Apulia, about 10 miles from the River.
The Romans decided to raise an army againt him and with approx 80 000 troops met him there.
This was the Battle of Cannae.
Marabal was the Numidian Cavalry commander which was suppose to be the weakest link in the cavalry department of Hannibals army.
However, based on the left of the battle, ( where they could do no real harm) he shattered the Roman cavalry and turned behind the main Roman army in the centre, ensuring their complete cut off from escape.