Complex sentence: He entered the Army on 2 June 1847 as an Ensign in the 93rd Sutherland Highlanders and after four years home service attained his promotion as Lieutenant, becoming a Captain two years later on 29 December 1854.
Split into simpler sentences: He entered the Army on 2 June 1847 as an Ensign in the 93rd Sutherland Highlanders. After four years home service, he attained his promotion as Lieutenant, becoming a Captain two years later on 29 December 1854.