Complex sentence: In 1826 he was transferred to the 15th regiment at Minden, but in the same year was appointed an instructor in the military cadet school at Berlin, where he devoted himself especially to the subject of military geography.
Split into simpler sentences: In 1826 he was transferred to the 15th regiment at Minden. Also in 1826, he was appointed an instructor in the military cadet school at Berlin, where he devoted himself especially to the subject of military geography.