Colonel Thomas Patterson Brockman (December 4, 1797 – August 20, 1859), was the son of Henry Brockman and Susannah Patterson. He was born in the Greenville District (now Greenville County), South Carolina. Brockman was a merchant and planter in the Greenville District and also owned land in the Spartanburg District. According to the 1850 slave schedules, he possessed thirty slaves in Greenville. He was also a member of the South Carolina House of Representatives and the South Carolina Senate.
Brockman was listed as a noted member of the community in Greenville as early as 1831, when he served as a parade marshal on the Fourth of July, as appointed by Perry E. Duncan and committee. At that ceremony he led three companies of militia, accompanied by Colonel Barron, Colonel Greene, and Major Goodlett. Brockman was colonel of the Third Regiment of the state militia (1831–1834).
Brockman was a prominent Unionist in the years before the Civil War. In 1832-1833, he served as Greenville delegate to the state convention on Nullification; he voted against nullification. He was state Senator from the Greenville district from 1836 to 1839, and Commissioner of Roads and of Public Buildings in 1844,
The slavery issue came to a head with the Compromise of 1850. South Carolina secessionists asserted that if the Compromise passe, South Carolina should withdraw from the Union.
Brockman's town of Greenville had long been a Unionist stronghold. In the October state elections of 1850, Brockman was elected state Senator, and fellow Unionists Benjamin Perry and Perry E. Duncan were also elected to the legislature. The Unionist started a newspaper, the Southern Patriot, to support the cause.
Nonetheless, the legislature called for a convention to be held to decide on secession. Brockman and other Unionists worked to delay the convention as long as possible, collaborating with the "cooperationist" faction. ("Cooperationists" did not explicitly opposed secession, but said that South Carolina should not act on its own, but only in "cooperation" with other Southern states.) When the convention delegates were finally elected in 1852, the Unionists and cooperationists defeated the secessionists 25,062 to 17,617. The Union was safe (for the time being) thanks in large part to the efforts of Brockman and the other Unionists of Greenville.