My great-great-great grandpa was Ed Burleson who fought alongside your old Jim Galbreath.
From wiki:
Known as the "Old Indian Fighter", Burleson was a veteran of the War of 1812 and had served in the Missouri and Texas militias. In October 1835 he was appointed a lieutenant colonel in the Texas army and served under Stephen F. Austin in the opening stages of the Texas Revolution. During the Siege of Béxar, Burleson served as the second-in-command to Gen. Austin, and in November, 1835 he was elected Major General of Texas Volunteers and took command of the volunteer army besieging San Antonio de Béxar and received the surrender of Mexican general Martín Perfecto de Cos. In March, he was appointed a Colonel of Texas Regulars and led the First Volunteer Infantry Regiment during the Runaway Scrape and at the Battle of San Jacinto.
Edward was the son of James B. Burleson, a company captain in the volunteer American army in the War of 1812 and later a participant in the Texas Revolution, as a Captain under his son's command. Edward learned of life in the field as an aide to his father, who could neither read nor write. Aaron Burleson, his grandfather, had fought as a minuteman in the Revolutionary War.
https://tshaonline.org/handbook/online/articles/fbu40