Master the Texas Surveyors Exam 2025 – Map Out Your Success!

The year that marks the Annexation of Texas into the United States is 1845. This significant event occurred after Texas gained independence from Mexico in 1836 and subsequently sought to join the United States. The annexation was officially approved by the U.S. Congress on December 29, 1845, leading to Texas becoming the 28th state of the Union on that date.

Choosing the other years does not accurately reflect the historical context of Texas's annexation. In 1836, Texas declared its independence from Mexico, which is an important milestone but not the annexation itself. The year 1842 does not coincide with any significant event regarding the annexation; it was during this time that tensions existed between Texas and Mexico, but it was not yet part of the U.S. Lastly, 1850 marks a later point in history relating to the Compromise of 1850, which dealt with various issues including the status of slavery and territories, but not the original annexation of Texas. Thus, 1845 is indeed the correct year when Texas formally joined the United States.