1. On March 21, 1820, Maine became the 23rd state in the United States. It had previously been a territory of Massachusetts.

2. The Maine State House, located in Augusta, was dedicated on March 21, 1832. The building serves as the capitol of the state of Maine and houses the offices of the governor and state legislature.

3. In 1902, a train carrying passengers and mail derailed in Wiscasset, Maine on March 21, killing at least 5 people and injuring many more. The cause of the accident was believed to be a broken rail.

4. On March 21, 1946, a major snowstorm hit Maine, dumping up to 26 inches of snow in some areas. The storm caused widespread power outages and disrupted transportation throughout the state.

5. Maine astronaut Christopher Cassidy, who grew up in rural Maine, launched into space for the first time on March 21, 2009. Cassidy served as a flight engineer on the space shuttle mission STS-127, which delivered the final components of the International Space Station.