Complex sentence: Promoted to captain on 30 November 1798, he became commanding officer of the sixth-rate HMS "Champion" and captured the French privateer "Anacreon" before taking part in the siege of French-held Valletta in Spring 1800.
Split into simpler sentences: Promoted to captain on 30 November 1798, he became commanding officer of the sixth-rate HMS "Champion" and captured the French privateer "Anacreon". He then took part in the siege of French-held Valletta in Spring 1800.