Butler was appointed a second lieutenant in the United States Army in 1818 and rose to the rank of captain before resigning his commission in 1829. Following his term as Governor of South Carolina, he became agent to the Cherokee at Fort Gibson (present day Muskogee County, Oklahoma), a post he held until 1846.
Burial
Following his death in Mexico, Butler's body was returned to South Carolina for burial. He was first entombed at Trinity Episcopal Church, just across from the State House. In December 1853 he was reburied in the Butler Family Cemetery, in the graveyard of what is now the Butler Methodist Church in Saluda County. Others buried in the plot are his father, Major General William Butler, his mother, Behethland Foote Moore Butler, a sister, five of his six brothers, Colonel Zachariah Smith Brooks, grandfather of Preston Brooks, and two children of his brother William, the only sibling not buried there. He is buried at Christ Episcopal Church in Greenville. Collectively they were four Colonels, one General, one Lt. Colonel, three Majors, and one Judge and US Senator. The General was a member of Congress, too.[2]
^Yarborough, Motte Jean. "Pierce Mason Butler and the Palmetto Regiment" in Saluda County: In Scene and Story. (Columbia, South Carolina Tricentennial Press, 1970) 15.