What event marked Texas's admission into the United States?

Texas’s admission into the United States was formally marked by the incorporation of the Republic of Texas in 1845. This event followed Texas declaring independence from Mexico in 1836 and operating as an independent republic for nearly a decade. The decision to join the United States was influenced by various factors, including political, economic, and security considerations.

When Texas accepted annexation, it signified a transition from being a sovereign nation to a state within the U.S., bringing significant changes to its governance and national identity. This incorporation was crucial as it also played a role in the lead-up to the Mexican-American War, subsequently reshaping territorial boundaries in the region. The other events listed are important in Texas history, but they do not directly pertain to the formal act of Texas becoming a state in the Union.