What event marks the point at which Texas gained independence from Mexico?

The event that marks Texas gaining independence from Mexico is the Battle of San Jacinto. This decisive battle took place on April 21, 1836, and culminated in a swift and significant victory for the Texan forces led by General Sam Houston against the Mexican army commanded by General Santa Anna. Following this battle, Santa Anna was captured, and he ultimately signed the Treaties of Velasco, which effectively recognized Texas's independence. The significance of the Battle of San Jacinto lies in its role as the turning point in the Texan War for Independence, leading directly to the establishment of the Republic of Texas.

While "A. Texan Independence" might seem relevant, it does not pinpoint a specific event like the Battle of San Jacinto does. The Battle of the Alamo is crucial in the narrative of Texas's fight for independence, symbolizing bravery and sacrifice, but it was not the moment Texas actually secured its independence. Texas Annexation refers to the later event when Texas was admitted to the United States in 1845, which came long after the fight for independence was won. Thus, the correct answer emphasizes the battle directly responsible for achieving independence.