1. In 1775, the Battle of Machias took place in Machias, Maine, which is considered the first naval engagement of the American Revolution. A group of patriots led by Jeremiah O'Brien captured a British ship, the HMS Margaretta, and became known as the "Machias rebels."

2. Maine officially became a state on June 13, 1820. It had been a part of Massachusetts until it was granted statehood through the Missouri Compromise.

3. On June 13, 1863, the 20th Maine Regiment played a pivotal role in the Battle of Gettysburg during the Civil War. Led by Colonel Joshua Chamberlain, the regiment held the Union's left flank and successfully repelled Confederate attacks, earning Chamberlain a Medal of Honor.

4. The Katahdin Woods and Waters National Monument was established on June 13, 2016, by President Barack Obama. This 87,500-acre park in northern Maine is known for its forests, rivers, and stunning views of Mount Katahdin.

5. In June 2019, Maine became the first state to ban single-use plastic bags statewide. The bill, signed into law on June 13, requires retailers to provide reusable or paper bags instead of plastic ones. This was seen as a significant step in reducing plastic waste and improving environmental sustainability.