Thomas Sidney Jesup (December 16, 1788 – June 10, 1860) was a United States Army officer known as the "Father of the Modern Quartermaster Corps".

He began his military career in 1808, and served in the War of 1812, seeing action in the battles of Chippewa and Lundy's Lane in 1814, where he was wounded.

[1] In 1836, while Jesup was still officially Quartermaster General, President Andrew Jackson detached him first to deal with the Creek tribe in Georgia and Alabama, and then to assume command of all U.S. troops in Florida during the Second Seminole War (1835–1842).

[2] His capture of Seminole leaders Osceola and Micanopy under a false flag of truce[3] provoked controversy in the United States and abroad.

[4] Many newspapers called for an inquiry and his firing but the government supported its general,[5] and at the conclusion of the hostilities, Jesup returned to his official post.