1. In 1870, Portland, Maine became the first city in the United States to have a professional baseball team. The team was called the Portland Forest Citys and played in the National Association.

2. The Great Fires of 1947, also known as the Maine Fires, began on September 6 and burned for several days. The fires destroyed more than 200,000 acres of land, killed 16 people, and left thousands homeless.

3. On September 6, 1896, the first minister of the African Methodist Episcopal Church in Portland was ordained. Reverend William H. Johnson was the first African-American to be ordained in Maine.

4. In 1963, the University of Maine at Augusta was founded. The school's original name was Augusta Vocational-Technical Institute and it was created to offer technical and vocational training to Maine residents.

5. On September 6, 2004, the Penobscot Narrows Bridge and Observatory opened to the public. The bridge spans the Penobscot River in Maine and the observatory provides stunning views of the surrounding area. The bridge is the tallest public bridge observatory in the world.