Complex sentence: He was Lord Lieutenant of the West Riding of Yorkshire from 1892 to 1904 and commanded the 7th Hussars, the Yorkshire Dragoons and the Yorkshire Mounted Brigade during the Boer War in 1900 and afterwards became an aide-de-camp to King Edward VII in 1902.
Split into simpler sentences: He was Lord Lieutenant of the West Riding of Yorkshire from 1892 to 1904. After his return to the United Kingdom, he became an aide-de-camp to King Edward VII in 1902.