1) In 1836, the Battle of San Jacinto took place on April 15, resulting in Texas winning its independence from Mexico.

2) On April 15, 1900, the deadliest natural disaster in U.S. history struck Galveston, Texas in the form of a Category 4 hurricane. The storm caused massive destruction and an estimated 8,000 deaths.

3) In 1947, Jackie Robinson made his Major League Baseball debut with the Brooklyn Dodgers against the Boston Braves on April 15. Robinson broke the color barrier in professional baseball and paved the way for future African American players, including those who played for the Texas Rangers.

4) The first Fiesta San Antonio parade took place on April 15, 1891. Fiesta is an annual celebration in San Antonio that includes parades, festivals, and other cultural events.

5) On April 15, 2013, a bombing occurred during the Boston Marathon, killing three people and injuring several hundred more. This event had a significant impact on the running community and sparked increased security measures at races and events, including those held in Texas.