1. Ethan Allen captured Crown Point: On August 27, 1775, Ethan Allen and a small group of American soldiers successfully captured Fort Ticonderoga and Crown Point from the British. This victory gave the American colonists control over important waterways and artillery, and played a crucial role in the American Revolution.

2. Vermont becomes a state: On August 27, 1791, Vermont became the 14th state to join the United States. Prior to this, it had been an independent republic for 14 years.

3. Waterspouts hit Lake Champlain: On August 27, 1812, two waterspouts were reported on Lake Champlain. A waterspout is a tornado that forms over water, and these particular ones caused significant damage to a number of boats on the lake.

4. The Battle of Bennington: On August 27, 1777, the Battle of Bennington took place in the town of Walloomsac. This battle is considered a major turning point in the Revolutionary War, as it helped to boost morale for the colonial forces and weaken the British army.

5. Hurricane Irene strikes: On August 27, 2011, Hurricane Irene caused widespread damage throughout Vermont. The storm dumped up to 11 inches of rain in some areas, causing flooding, road closures, and power outages. It was one of the deadliest and costliest hurricanes in Vermont's history.