1. In 1703, the Connecticut General Assembly passed a law requiring each town to open a school so that children could learn to read and write.

2. On December 20, 1777, the Continental Army under the command of General George Washington marched into their winter quarters at Valley Forge, Pennsylvania, after a grueling campaign against the British army.

3. In 1835, the Hartford Fire Insurance Company was founded in Connecticut, becoming the first fire insurance company in the United States.

4. On December 20, 1848, the state of Wisconsin was admitted to the Union as the 30th state. Many Connecticut residents migrated to Wisconsin in the mid-19th century, contributing to its early growth and development.

5. The historic Colt Armory in Hartford, Connecticut, was established by firearms inventor Samuel Colt on December 20, 1855. The armory produced some of the most famous firearms in American history, including the Colt 1911 pistol, which was used by the U.S. military for over 70 years.