1. The Cincinnati Reds played their first game on April 30, 1869. The team, originally known as the Cincinnati Red Stockings, defeated the Great Westerns 45-9 in a game that marked the beginning of professional baseball in the United States.

2. On April 30, 1803, the Ohio General Assembly passed a resolution authorizing the construction of the Ohio and Erie Canal. This ambitious project was designed to connect Lake Erie to the Ohio River, and it played a crucial role in the economic development of the state.

3. Ohio native and astronaut Neil Armstrong was awarded the Presidential Medal of Freedom on April 30, 1969, for his historic moon landing the previous year. Armstrong was the first person to set foot on the moon, and his achievement was celebrated throughout the world.

4. On April 30, 1838, Ohio Governor Wilson Shannon declared martial law in the city of Toledo in response to a boundary dispute between Ohio and Michigan. This dispute, known as the Toledo War, was eventually resolved in Ohio's favor, and Toledo became part of the state.

5. The Ohio State University was officially designated as a university on April 30, 1870. The school had previously been known as Ohio Agricultural and Mechanical College, but its new name reflected its growing stature and expanded academic offerings. Today, Ohio State is one of the largest and most prestigious universities in the country.