1. Vermont State Fair: September 18, 1856, marks the first Vermont State Fair. Since then, the event has become a significant yearly celebration of Vermont's agriculture, culture, and heritage. This fair attracts thousands of people from all over the state and beyond, and features agricultural exhibits, rides, games, concerts, and more.

2. Lake Champlain Victory: On September 18, 1814, during the War of 1812, the U.S. Navy won a decisive victory over the Royal Navy at the Battle of Plattsburgh Bay on Lake Champlain. The battle is seen as a significant turning point in the war, and it helped secure peace negotiations between the U.S. and Britain.

3. First Native American Governor: September 18, 1985, saw the election of Madeleine May Kunin as the governor of Vermont, making her the first woman to hold the office and the first Native American woman to be elected governor in the United States.

4. Birth of Chester A. Arthur: Chester A. Arthur, the 21st President of the United States, was born on September 18, 1829, in Fairfield, Vermont. Arthur served as president from 1881 to 1885 and is remembered for his efforts to modernize the U.S. Navy.

5. Vermont's 14th Governor: On September 18, 1817, William A. Palmer became the 14th Governor of Vermont. A lawyer and judge, Palmer served as governor from 1817 to 1820, overseeing the development of the state government and judiciary during a critical period in Vermont's history.