1. In 1903, the city of Oklahoma City was struck by a deadly tornado that killed 17 people and caused widespread destruction. The tornado was one of the deadliest in the state's history and led to significant efforts to improve storm warning systems and public safety.

2. On August 30, 1968, the Jim Thorpe Native American Games were held in Tahlequah, Oklahoma. The games were named after the famous athlete and Oklahoma native and aimed to promote Native American athleticism and culture. The event continues to be held to this day as the Native American Intertribal Games.

3. In 1918, the Choctaw Nation of Oklahoma made a significant contribution to the United States war effort during World War I. A group of Choctaw soldiers used their native language as an unbreakable code while serving as radio operators in the war. This early instance of code talkers helped pave the way for similar efforts in future conflicts.

4. On August 30, 1838, the United States Army forcibly removed the Cherokee Nation from their land in present-day Georgia and forced them to march westward to Indian Territory in Oklahoma. The forced relocation, known as the Trail of Tears, was a dark chapter in American history and resulted in the deaths of thousands of Cherokee people.

5. The University of Oklahoma football team played its first-ever game on August 30, 1895, defeating the Oklahoma City Town Team by a score of 34-0. The OU football program has since become one of the most successful in the country, boasting seven national championships and multiple conference titles.