Which significant acquisition took place during James Monroe's presidency?

The acquisition of Florida occurred during James Monroe's presidency and is significant for several reasons. The United States officially acquired Florida from Spain in 1819 through the Adams-Onís Treaty, which was finalized in 1821. This acquisition not only expanded U.S. territory but also addressed ongoing tensions between the U.S. and Spain, particularly regarding the presence of Native American tribes and runaway slaves in the region.

Monroe's presidency (1817-1825) was marked by the desire to solidify U.S. borders and enhance national security. The acquisition of Florida helped eliminate a source of conflict with Spain and provided greater control over southern borders. This was vital as the U.S. sought to expand and assert its influence in North America, especially given the context of Manifest Destiny that would arise in later years.

In contrast, the Louisiana Purchase occurred earlier, in 1803, and largely falls outside Monroe's term. The purchase of Alaska, which was made in 1867, is also not relevant to Monroe's presidency. The Gadsden Purchase, aimed at facilitating a southern transcontinental railroad, took place in 1853, well after Monroe's time in office. Therefore, the acquisition of Florida is the correct answer as it is directly