In 1887, he was promoted to captain and attended the Staff College, Camberley from 1892 to 1893. Snow was promoted in 1895 to brigade major at Aldershot and further in 1897 to major in the Royal Inniskilling Fusiliers. Snow was brigade major for William Gatacre in the Nile campaign of 1898, fighting at the Battle of Atbara and the Siege of Khartoum. He was twice Mentioned in Despatches for his services in the Sudan.