When General Andrew Jackson campaigned through West Florida and took possession of Pensacola in 1818, he was traveling through territory not previously explored and mapped by an American. To traverse this territory with his army, he had to depend upon receiving extensive topographical information. For this he relied upon the surveys provided at the time by Captain Hugh Young, assistant topographical engineer and fellow Tennessean.
Dibble, Ernest F.
"Captain Hugh Young and His 1818 Topographical Memoir to Andrew Jackson,"
Florida Historical Quarterly: Vol. 55:
3, Article 7.
Available at: https://stars.library.ucf.edu/fhq/vol55/iss3/7