John Quincy Adams, Secretary of State, and Luis de Onís y Gonzalez-Var, Ambassador from Spain, sign a treaty ceding the Spanish enclave of West Florida to the united States.  The treaty also defines the border between the Spanish enclave of Mexico and the u.S.  In addition, Spain also renounces all claims to the disputed enclave of Oregon.

       [restored 12/18/2021]

Subsequent Events:

Authority:

Articles of Confederation, Article XI
ccc-2point0.com/articles-of-confederation

References:

Calvin D. Linton, ed. The Bicentennial Almanac: 200 Years of America, 1776-1976, (Nashville, Tennessee: Thomas Nelson, 1975), 85.

Current U.s. National Debt:

$36,167,124,467,492

Source