The treaty remained in full force for only 183 days: from February 22, 1821 to August 24, 1821, when Spanish soldiers signed the Treaty of Cordoba, which recognized Mexico`s independence; Spain rejected this treaty, but Mexico took effective control of the former Spanish colony. The border treaty between Mexico and the United States, signed in 1828 and entered into force in 1832, recognized the boundary defined by the Adams Onís Treaty as a boundary between the two nations. The advance turned to war in 1846, and after the United States conquered the provinces once considered the limits of American growth, a huge expansion of the territory revealed the nation`s ugliest disagreement: what to do against slavery? The contract, which consists of 16 articles, was concluded on the 22nd  Adams and Onís negotiated the final agreement, but the problems between their two nations date back to the early days of the American Republic. Q: Who owns Florida longer: Spain or the United States? Our new column, Florida Time, will often mark big anniversaries. It`s a big one. Two hundred years ago this week, Florida became part of the United States. First, we have to go back about half a century before 1819. Most people, when asked which side Florida fought on in the American Revolution, would probably say, "They didn`t. They were part of Spain. These people would be wrong. As we discovered in last week`s column, Spain claimed Florida until 1513. .