1. Vermont became the first state in the United States to abolish slavery on April 18, 1777. This was a significant step towards equality and liberation for African Americans in Vermont.

2. The University of Vermont was established on April 18, 1791. Its first classes were held in a building in Burlington, Vermont, with only seven students enrolled in the program.

3. The Vermont Eugenics Survey was launched on April 18, 1925. This controversial program aimed to study and improve the genetic quality of Vermont's population through selective breeding and sterilization.

4. Caledonia County's first public library was established on April 18, 1929, in St. Johnsbury, Vermont. The library still serves the community today, and is considered one of the top libraries in Vermont.

5. The Northeast Kingdom International Airport was officially opened on April 18, 1954, in Coventry, Vermont. This airport serves as an important transportation hub for the Northeast Kingdom region, connecting residents and tourists with the rest of the world.