Bennington Battle Day is a state holiday unique to Vermont which commemorates the American victory at the Battle of Bennington (which actually took place in New York) during the American Revolutionary War in 1777. The holiday's date is fixed, and occurs on August 16 every year.
In Bennington, there is a battle re-enactment put on by the local history foundation. Also, the town fires the oldest cannon in America, which is called the Molly Stark cannon, named after the commander John Stark's wife.
The Battle of Bennington is named as such, because the battle was over weapons and munitions stored where the Bennington Battle monument now stands. This site is located in, what is now referred to as, Old Bennington, Vermont.