1. In 1836, the Battle of San Jacinto took place on May 12, which is considered to be one of the most significant battles in Texas history. The battle lasted for only 18 minutes and resulted in the defeat of Mexican forces by Texan troops led by General Sam Houston, effectively ending the Texas Revolution.

2. On May 12, 1902, the Texas State Teachers Association was founded in Austin. The association was formed to provide support and resources to educators throughout the state and has since grown to become the largest professional organization for educators in Texas.

3. In 1924, the University of Texas at Austin dedicated its new football stadium on May 12. The stadium, which was originally known as "Texas Memorial Stadium," has since become one of the most iconic college football venues in the country.

4. On May 12, 1982, the state of Texas became the first state in the United States to pass a "right to work" law. This law prohibits employers from requiring employees to join a union as a condition of employment and is still in effect today.

5. In 2015, severe flooding occurred across Texas during the month of May, including on May 12. The flooding, which was caused by heavy rainfall over an extended period of time, resulted in extensive damage and several fatalities across the state.