What significant event did Santa Anna sign in relation to Texas?

The Treaty of Velasco is the significant event that Santa Anna signed in relation to Texas. This treaty was crucial because it marked the end of the Texas Revolution and recognized Texas' independence from Mexico in 1836. Under this agreement, Santa Anna, who was the Mexican general and president, agreed to withdraw his troops from Texas and recognized the Rio Grande as the boundary between Texas and Mexico.

The treaty established a foundational moment for Texas, cementing its status as an independent republic. The significance of this event is underscored by how it enabled Texas to later seek entry into the United States as a state. The other treaties mentioned play important roles in U.S. history but do not directly relate to Santa Anna's actions concerning Texas independence. For example, the Treaty of Guadalupe Hidalgo ended the Mexican-American War in 1848, and the Treaty of Paris pertains to the end of the American Revolutionary War. The Republic of Texas Act refers to legislative actions post-independence rather than a treaty signed by Santa Anna.