1. On June 18, 1784, New Hampshire established Dartmouth College, the ninth oldest institution of higher education in the United States. It was founded primarily to educate Native Americans and was originally called Dartmouth College for Indians.

2. In 1812, New Hampshire declared war on Great Britain, joining the United States in the War of 1812. The state raised several regiments of volunteers to fight in the conflict.

3. On June 18, 1825, New Hampshire Governor Samuel Bell signed a bill abolishing capital punishment in the state. However, the law was later repealed, and the death penalty was reinstated in 1842.

4. Elizabeth Cady Stanton, a prominent suffragist and women's rights activist, spoke in Concord, New Hampshire on June 18, 1868, advocating for women's right to vote. She was greeted with a large and enthusiastic crowd.

5. On June 18, 1945, Portsmouth, New Hampshire was the site of a historic meeting between President Harry S. Truman and British Prime Minister Winston Churchill to discuss the end of World War II and post-war reconstruction efforts. The two leaders traveled to Portsmouth on board the USS Augusta.