1. Iowa became a state on August 15, 1846. After being part of the Minnesota and Wisconsin territories, Iowa joined the Union as the 29th state. The state's capital, Des Moines, was later established in 1851.

2. On August 15, 1945, Iowans celebrated the end of World War II. The news of Japan's surrender spread quickly, and people took to the streets in celebration. Church bells rang, sirens blared, and people hugged each other with tears in their eyes.

3. The famous Iowa State Fair always begins on August 15 and runs for 11 days. The fair has been a tradition in Iowa since 1854, and it is known for its giant butter cow sculpture, fried foods, and entertainment.

4. Legendary Iowa-born actor John Wayne was born on May 26, 1907. However, August 15 is recognized in Iowa as "John Wayne Day" to commemorate the actor's accomplishments and contributions to American culture.

5. On August 15, 1913, the Iowa State Capitol building was completed. The building is known for its impressive dome and Greek Revival architecture. It stands as a symbol of Iowa's pride in its history and government.