Robert M Mann from South Carolina Early 1800

I'm researching my tree and can only go back to Robert M Mann.

He Married Sarah Catherine Strange (1835???) Had 10 children.

John, Samuel, Thomas, James, Joseph, Robert, Rufus, twins (Mattie and Mary), and Almoth.

He moved to Alabama just before the civil war and served in the 58th Alabama Infantry Regiment during the war.

He moved his family to MS, then TX, then OK after the war. one of his sons moved back to MS (My line) and the rest stayed in OK.

looking for any information on the family in OK or history about Robert's parents and lineage.

thanks,
Jason