1. In 1931, the city of Dubuque welcomed its first air mail service from Chicago, marking a significant moment in the city's transportation history.

2. In 1862, the Battle of Shiloh began in Tennessee, in which many Iowa soldiers fought and lost their lives. The battle was later recognized as one of the bloodiest battles in the Civil War.

3. In 1846, Iowa became the 29th state in the United States. The state's capital, Des Moines, was later established in 1851.

4. In 1912, the infamous Titanic sank in the North Atlantic, causing the deaths of several Iowans who were aboard the ship.

5. In 1994, the Iowa legislature recognized the "Iowa Barn Foundation" as an official non-profit organization, committed to preserving the state's iconic barns and rural heritage. Since then, the organization has saved over 900 significant structures in Iowa.