1. On March 6, 1765, the New Hampshire General Assembly became the first American colony to take formal action against the British Parliament's Stamp Act. The assembly declared the act unconstitutional and therefore void in New Hampshire, leading the way for other colonies to follow suit.

2. In 1827, on March 6th, the first railway in New Hampshire was chartered to run from Portsmouth to Concord. The railway would eventually be built and significantly improve transportation and commerce throughout the state.

3. The New Hampshire Supreme Court issued a landmark ruling on March 6, 1858, in the case of Baker v. Fenn. The court decided that a party who knowingly breaches a contract is liable for not only the direct damages caused by the breach but also any resulting damages that could have been reasonably foreseen.

4. On March 6, 1860, the Dartmouth College Case came before the United States Supreme Court. The case centered on the state of New Hampshire's attempt to revise the charter of Dartmouth College, which had been established as a private institution. The court ultimately ruled in favor of the college and upheld the sanctity of private contracts.

5. The American author and illustrator Robert McCloskey was born in Hamilton, Ohio, on March 6, 1914. McCloskey is known for his classic children's books, including "Make Way for Ducklings" and "Blueberries for Sal." Although he did not have a direct connection to New Hampshire, his books and illustrations have delighted generations of New Hampshire children.