1. First Naval Battle of the American Revolution: On September 11, 1776, Maine played a significant role in the first naval battle of the American Revolution. The Battle of Valcour Island, fought on Lake Champlain in New York, saw the American navy led by Benedict Arnold, made up largely of sailors from Maine and Massachusetts, defeat a British fleet, preventing their advancement into the Hudson Valley.

2. Maine declared its independence: On September 11, 1819, Maine officially declared its independence from Massachusetts, becoming the 23rd state of the United States. It was the result of a long and contentious fight, with Maine residents wanting more control over their own affairs and greater representation in government.

3. Tragedy strikes: On September 11, 1947, tragedy struck Maine when a fire broke out at the Maine School for the Deaf in Portland, killing 14 people, including 12 students. The fire, which was believed to be caused by an electrical problem, spread quickly through the wooden building, trapping students and staff.

4. Maine hosts international summit: On September 11, 1995, Maine hosted a historic international summit, the Northern European Conference, bringing together leaders from the United States, Russia, Canada, Sweden, Finland, Norway, Denmark, and Iceland. It focused on establishing closer economic ties and promoting peace and stability in the region.

5. Maine remembers 9/11: On September 11, 2001, Maine joined the rest of the nation in shock and disbelief as terrorist attacks unfolded in New York City, Washington D.C., and Pennsylvania. The state lost two residents, Todd Beamer, who was on United Flight 93, and James Roux, a New York City firefighter. In the years since the attacks, Maine has taken steps to honor those who lost their lives and to support first responders and military personnel.