Complex sentence: Casualties on "Crescent" were equally light, with just one man injured; he had been standing too close to his own cannon during the opening broadside and had been struck by the recoiling gun, suffering a broken leg.
Split into simpler sentences: Casualties on "Crescent" were equally light, with just one man injured. He had been standing too close to his own cannon during the opening broadside and had been struck by the recoiling gun, suffering a broken leg.