Complex sentence: In 1882, he was appointed brigadier general and assigned to the Department of Texas (October 30,1883) he began to demonstrate odd behavior which was attributed from a fall from a wagon at Fort Sill, Oklahoma, in which he injured his head.
Split into simpler sentences: In 1882, he was appointed brigadier general and assigned to the Department of Texas (October 30,1883). He began to demonstrate odd behavior which was attributed to a fall from a wagon at Fort Sill, Oklahoma, in which he injured his head.