1. On April 13, 1863, the Civil War Battle of Fort Bisland began in Louisiana. Maine soldiers fought in the battle as part of the Union army.

2. The Augusta State Airport in Maine was dedicated on April 13, 1946. It was originally built as a military airfield during World War II and is now used for civilian aviation.

3. On April 13, 1973, Maine became the first state in the US to ban the sale and use of certain high-polluting grades of gasoline. This was the first step in a nationwide effort to reduce air pollution from automobiles.

4. A significant snowstorm hit Maine on April 13, 2018, bringing heavy snow and strong winds to the state. Several inches of snow fell, causing power outages and travel disruptions.

5. The Maine Supreme Judicial Court upheld same-sex marriage on April 13, 2009, making Maine the fifth state in the US to allow same-sex couples to marry. The decision came after months of debate and legal proceedings.