1. Iowa became a state:
On March 10, 1845, President John Tyler signed the bill that admitted Iowa as the 29th state in the United States.

2. The Great March Flood:
On March 10, 1965, a devastating flood hit Iowa. The flood waters caused millions of dollars in damages and forced thousands of people to evacuate their homes.

3. John L. Lewis was born:
John L. Lewis, a prominent labor union leader, was born on March 10, 1880, in Lucas, Iowa. Lewis played an instrumental role in founding the Congress of Industrial Organizations (CIO) and served as the president of the United Mine Workers of America.

4. Dr. George Gallup was born:
Dr. George Gallup, the famous pollster and founder of the Gallup Organization, was born on March 10, 1901 in Jefferson, Iowa. Gallup developed innovative polling techniques that transformed the field of public opinion research.

5. Aviator pioneer Harriet Quimby was born:
On March 10, 1875, Harriet Quimby, an aviation pioneer, was born in Arcadia, Iowa. Quimby made history in 1911 when she became the first woman to receive a pilot's license in the United States. She also became the first woman to fly across the English Channel in 1912.