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Monroe’s government seriously considered denouncing Jackson’s actions, but Adams defended the Jackson citing the necessity to restrain the Indians and escaped slaves since the Spanish failed to do so. Adams also sensed that Jackson’s Seminole campaign was popular with Americans and it strengthened his diplomatic hand with Spain. Adams used Jackson’s military action to present Spain with a demand to either control the inhabitants of East Florida or cede it to the United States. Minister Onís, due to France's takeover by Napoleon, left Spain with few reasonable options. Florida was not able or particularly interested in maintaining its presence in Florida.

Minister Onís and Secretary Adams reached an agreement whereby Spain ceded East Florida to the United States and renounced all claim to West Florida. Spain received no compensation, but the United States agreed to assume liability for $5 million in damage done by American citizens who rebelled against Spain. Under the Onís-Adams Treaty of 1819 (also called the Transcontinental Treaty and ratified in 1821) the United States and Spain defined the western limits of the Louisiana Purchase and Spain surrendered its claims to the Pacific Northwest. In return, the United States recognized Spanish sovereignty over Texas. While Spain's rights to Texas were recognized, that situation changed extraordinarily fast when Mexico received its sovereignty on September 27, 1821.

* Republished from [https://history.state.gov/| Office of the Historian, United States Department of State]

* Article: [https://history.state.gov/milestones/1801-1829/florida| Acquisition of Florida: Treaty of Adams-Onis (1819) and Transcontinental Treaty (1821)]

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[[Category:US State Department]] [[Category:Wikis]][[Category:United States History]] [[Category: History of the Early Republic]] [[Category:19th Century History]] [[Category:Political History]] [[Category:Diplomatic History]]