1. In 1865, New Hampshire abolished slavery, becoming the first state in the country to do so after the Civil War. This was done through an amendment to the state's constitution that was ratified on June 19th of that year.

2. On June 19, 1910, ex-president Theodore Roosevelt gave a speech in Concord, New Hampshire, in which he spoke about conservation and the need to protect the nation's natural resources. This speech was part of a series of speeches he gave during a national tour, which helped to popularize the conservation movement.

3. In 1936, the famous poet Robert Frost delivered a commencement address at the University of New Hampshire on June 19th. In his speech, he encouraged graduates to embrace their individuality and to pursue their passions in life.

4. Portsmouth, New Hampshire, played a significant role in the American Revolution. On June 19, 1775, American forces led by General John Sullivan captured Fort William and Mary, which was held by the British. This was one of the first actions of the war in New England.

5. In 1784, New Hampshire ratified the Constitution of the United States on June 19th, becoming the ninth state to do so. This helped to solidify the new government and paved the way for the country's expansion and growth in the years to come.