Complex sentence: He became lieutenant-general and colonel-commandant Royal Artillery in 1864, general in 1868, commanded the forces in Canada from 1859 to 1865, held the governorship of Nova Scotia 1865--1867.
Split into simpler sentences: He became lieutenant-general and colonel-commandant Royal Artillery in 1864, general in 1868, commanded the forces in Canada from 1859 to 1865. He held the governorship of Nova Scotia 1865--1867.