Complex sentence: Rodgers was warranted midshipman in the Navy on April 30,1836 and was promoted to passed midshipman on July 1,1842, and served in the West Indies, Africa, and Mediterranean.
Split into simpler sentences: Rodgers was warranted midshipman in the Navy on April 30,1836 and was promoted to passed midshipman on July 1,1842. He served in the West Indies, Africa, and Mediterranean.