Complex sentence: Admiral Tourville therefore, finding himself with few adversaries in the centre, pushed forward his own leading ships which Torrington's dispositions had left without opponents, further strengthening the French attack in the van.
Split into simpler sentences: Admiral Tourville therefore, found himself with few adversaries in the centre. He pushed forward his own leading ships which Torrington's dispositions had left without opponents, further strengthening the French attack in the van.