1. The Battle of Chusto-Talasah was fought on May 6, 1861, near present-day Tulsa. This was the first significant battle fought in Indian Territory during the American Civil War.

2. On May 6, 1935, a severe dust storm swept across Oklahoma, Kansas, and Texas, causing widespread damage and loss of life. This event, known as Black Sunday, was one of the worst dust storms of the Dust Bowl era.

3. The University of Oklahoma's football stadium, Gaylord Family Oklahoma Memorial Stadium, was dedicated on May 6, 1923. The first game played at the stadium was against Washington University, with Oklahoma winning 62-7.

4. On May 6, 1942, the United States Army established Fort Sill as a Japanese internment camp. Over the course of World War II, more than 7,000 Japanese Americans were held at the camp.

5. The first tornado warning in history was issued on May 6, 1948, in Oklahoma City. The warning was made possible by the invention of the tornado-detecting radar by Dr. Robert C. Miller just a year prior.