In 1845, the United States acquired Texas, making it the country's 28th state. Texas was given statehood by a vote of Congress, but it wasn't formally recognized as a state until December 1845.
Texas had been a part of Mexico up until 1836, but that year some American Americans living in Mexican Texas proclaimed independence. They gave their new nation the name Republic of Texas, and it ruled on its own for nine years.
Whether Texas should be accepted as a slave or free state caused political rifts in the United States. Ultimately, Texas was admission as a slave state to the US.
The Mexican-American War began as a result of Texas' annexation (1846-1848). Part of the reason for the conflict's onset was a dispute over the Nueces or the Rio Grande as Mexico's actual northern border.
Learn more about Texas here:
brainly.com/question/12153172
#SPJ4