1. Vermont became the 14th state to legalize same-sex marriage on March 18, 2009. This made it the first state to legalize same-sex marriage through legislation rather than a court ruling or popular vote.

2. The town of Manchester, Vermont was devastated by a flood on March 18, 1927. The flood, caused by heavy rain and melting snow, destroyed homes and businesses in the area and resulted in the deaths of 21 people.

3. Vermont Senator and former Governor George Aiken was born on March 18, 1892. Aiken served in the Senate for 34 years and was known for his environmental conservation efforts, including the creation of the Green Mountain National Forest.

4. On March 18, 1986, the Vermont House of Representatives voted to pass a bill that banned cigarette smoking in most public places. This made Vermont one of the first states in the country to enact a comprehensive smoking ban.

5. The first recorded ascent of Mount Mansfield, the highest peak in Vermont, was made on March 18, 1794 by Ethan Allen and his party. The mountain is named after its distinct profile, which resembles the profile of a face lying down.