1. Texas declared independence from Mexico on March 2, 1836, but it was on March 3 that the delegates at Washington-on-the-Brazos signed the Texas Declaration of Independence, formally proclaiming Texas a free and independent republic.

2. On March 3, 1845, the United States Congress approved the annexation of Texas, making it the 28th state in the Union. This decision was met with controversy, as it led to the Mexican-American War and tensions over the expansion of slavery.

3. The Battle of Matamoros took place on March 3-4, 1846, during the Texas Revolution. General Zachary Taylor and his troops repelled a larger force of Mexican soldiers, helping to secure the border and defend Texas from invasion.

4. Texas-born jazz musician and bandleader Jack Teagarden was born on March 3, 1905. Known for his innovative trombone playing and bluesy vocals, Teagarden performed with some of the biggest names in the industry and helped popularize the genre in the early 20th century.

5. The Texas Longhorns college football team won the national championship on March 3, 2006, in a thrilling victory over the USC Trojans. Led by quarterback Vince Young, the Longhorns secured their fourth national title and cemented their place in Texas sports history.