1. On September 13, 1839, Cherokee Nation Principal Chief John Ross arrived at present-day Tulsa after being forced from his home in Georgia during the Trail of Tears. Ross worked to rebuild Cherokee Nation in Oklahoma and served as its leader for over 38 years.

2. On September 13, 1913, the Oklahoma State Capitol building was completed after four years of construction. The building stands at 450 feet tall and features a dome made of steel and concrete. It is the only capitol building in the United States with an oil well on its grounds.

3. On September 13, 1950, Oklahoma City hosted the first International Finals Rodeo. The event featured the top cowboys and cowgirls from around the world competing in events such as barrel racing, bronc riding, and bull riding. The International Finals Rodeo eventually became the National Finals Rodeo and is still held in Las Vegas each year.

4. On September 13, 1999, Oklahoma City hosted the first World Cup of Softball. The tournament featured teams from around the world competing in one of the most popular sports in Oklahoma. The World Cup of Softball eventually became an annual event and was held in Oklahoma City until 2017.

5. On September 13, 2011, a 4.7 magnitude earthquake struck near Prague, Oklahoma. The earthquake was the strongest recorded in Oklahoma at the time and was linked to oil and gas drilling in the area. It caused damage to homes and buildings and raised concerns about the impact of fracking on the environment in Oklahoma.