AHC: Early 19th Century Spanish-American War

Your challenge is to have the United States go to war with Spain in the early part of the 19th century, and win. The dispute should ideally be over any/all of the following territories: Louisiana, Florida, Mexico, Cuba. POD should be after... 1776, for a nice patriotic number.

Bonus points are awarded if:
- The US rhetoric is about as noble as that of the historical Spanish-American War.
- The actual war is about as expansionist as the historical Mexican-American war (in that the goal is pretty obviously territory and not a string of allied states)
- Louisiana is in Spanish hands at the time.

Feel free to:
- Derail or butterfly any aspects of the Revolutionary and Napoleonic eras of France, if it helps.
- Embroil Spain in any major European conflicts, if it helps.
- Have any European major power subtly helping America, if it helps.
- Have the Revolutionary War go better for America, if it helps (successful Canadian expedition(s)).

Have at it.
 
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