U.S. Annexation of Texas as 28th State

The United States formally annexed the Republic of Texas, elevating it to the status of the 28th state. Texas, which had been an independent nation following its victory in the Texas Revolution against Mexico in 1836, joined the Union amid significant debate. The admission was driven by a mix of support for westward expansion and the desire for a stronger border with Mexico, leading to tensions that would later escalate.