1. Vermont Statehood Day: On October 15, 1791, Vermont officially became the 14th state to join the United States. The state's Constitution was drafted and adopted, and the first governor and General Assembly were elected.

2. Ethan Allen's Capture: During the Revolutionary War, Ethan Allen, a leader of the Green Mountain Boys, was captured by the British on October 15, 1775, while attempting to capture Fort Ticonderoga. He was imprisoned in England until 1778, when he was exchanged for a British officer.

3. The First Vermont Yankee Nuclear Plant Shutdown: The Vermont Yankee nuclear power plant in Vernon was shut down permanently on October 15, 2014, after decades of controversy over the safety and environmental impact of the plant. It was the fifth oldest nuclear power plant in the United States.

4. Vermont's First Schoolhouse: The first schoolhouse in Vermont was built on October 15, 1785, in Newbury. It was a one-room schoolhouse with a shingle roof, a fireplace, and a wooden floor. The schoolhouse was used until 1825, when a larger school was built.

5. First Week-Long Vermont State Fair: The first week-long Vermont State Fair was held on October 15, 1967, in Rutland. The fair, which featured livestock shows, agricultural exhibits, and carnival rides, attracted over 100,000 visitors in its first year. Today, the fair is held annually in August in Rutland.