Complex sentence: In 1853, Baraguey d'Hilliers was sent to Constantinople as ambassador extraordinaire, recalled in 1854, during the Crimean War he was given command of the expeditionary force destined for the Baltic sea.
Split into simpler sentences: In 1853, Baraguey d'Hilliers was sent to Constantinople as ambassador extraordinaire, and recalled in 1854. During the Crimean War he was given command of the expeditionary force destined for the Baltic Sea.