Antigonus I Monophthalmus
Demetrius served with his father, Antigonus I Monophthalmus, during the Second War of the Diadochi. He participated in the Battle of Paraitakene where he commanded the cavalry on the right flank. Despite the Antigonid left flank, commanded by Peithon, being routed, and the center, commanded by Antigonus, being dealt heavy losses at the hands of the famous Silver Shields, Demetrius was victorious on the right, and his success there ultimately prevented the battle from being a complete loss.