Complex sentence: In 1854 the Divisional General Louis Lepic was the commanding officer and in 1855, Colonel Baron Albert Jacques Verly, who commanded the squadron until 1857 when he was replaced by Captain Armand Ernest Junqua.
Split into simpler sentences: In 1854 the Divisional General Louis Lepic was the commanding officer suceeded in 1855 by Colonel Baron Albert Jacques Verly. The latter commanded the squadron until 1857 when he was replaced by Captain Armand Ernest Junqua.