Which development was a direct result of the ideas expressed in James K. Polk's 1845 Inaugural Address?

James K. Polk's 1845 Inaugural Address emphasized the importance of territorial expansion and Manifest Destiny, which was the belief that the United States was destined to expand across the North American continent. This idea was a driving factor behind the annexation of Texas and the push for Oregon, as Polk advocated for the acquisition of these territories to fulfill America's perceived providential right to expand.

During his presidency, Polk actively pursued the annexation of Texas, which was officially achieved shortly after he took office, and he also sought to resolve the Oregon boundary dispute with Britain, ultimately leading to the U.S. gaining Oregon Territory. The developments in these areas were directly influenced by the themes of expansion and national growth articulated in his inaugural address, making the annexation of Texas and Oregon a direct outcome of his ideas and policies.