1. In 1722, a group of Native Americans attacked the settlement of Dover, New Hampshire, killing 25 people and capturing 29. The attack was part of a series of conflicts known as the Lovewell's Wars, which pitted English colonists against the Abenaki tribe.

2. On May 27, 1919, a German U-boat sunk the USS San Diego off the coast of New Hampshire. The ship was carrying American troops home from World War I and 6 crew members died in the attack.

3. The first public library in New Hampshire was established in Peterborough on May 27, 1833. The library was founded by Reverend Abiel Abbot and contained about 200 books.

4. On May 27, 1955, the Mount Washington Cog Railway in New Hampshire became the first mountain-climbing cog railway in the world to operate a diesel electric locomotive instead of steam power.

5. In 1977, John B. Anderson, a Republican congressman from Illinois announced his candidacy for the presidency in Portsmouth, New Hampshire on May 27. Anderson would go on to run as an independent candidate in the 1980 election, winning 6.6% of the popular vote.