1. Statehood Day: August 15 is an important day in Arkansas history as it marks the anniversary of the state's admission to the Union on this day in 1836. Arkansas became the 25th state to join the United States of America, and the ceremony was held in Little Rock.

2. Civil War Connection: August 15, 1862 was a significant day in the Civil War, as the Battle of Lone Jack was fought in Jackson County, east of Kansas City. This conflict was one of the decisive battles fought in Missouri during the Civil War.

3. A Famous Educator's Birthday: Mary McDowell, a prominent educator and social reformer in the early 20th century, was born in St. Charles, Arkansas on August 15, 1854. She was instrumental in establishing the University Settlement in New York City, which was a center for social services and education for immigrants and the working poor.

4. Historic Flooding: August 15, 1898 saw some of the worst flooding in the state's history, as the White River overflowed its banks and caused extensive damage in several towns and communities along its path. The floodwaters reached as high as 25 feet, and it took months for the affected areas to recover.

5. The Rock Island Line: August 15, 1967 marked the last run of the Rock Island Line passenger train through Little Rock, ending a nearly century-long tradition of rail service in the city. The train was an important part of Arkansas's transportation system and helped to connect the state with the rest of the country.