Tri-State 250: Our legacy of liberty

A massive chain link was installed across the Hudson River to prevent the British Navy from advancing during the American Revolution. Mary Calvi shares this piece of history and gets an up-close look at the chain on display at Washington's Headquarters in Newburgh. 

Historians believe 10 crucial days in New Jersey made the difference between victory and defeat in the American Revolutionary War. The Continental Army crossed the icy Delaware River into New Jersey, followed by significant victories at two battles. 

The Philipsburg Proclamation was signed in New York in the 1770s. It was signed by a British general and promised freedom to any enslaved person who took refuge behind British lines. Mary Calvi takes us to Philipse Manor Hall State Historic Site in Yonkers, where the document is on display.

A mystery still remains from 250 years ago. Named the Great Fire of 1776, the inferno was so large it burned a fifth of New York City to the ground. To this day, the question of whether or not it was sabotage lingers. Watch Mary's full report in the video above.