Battle of Quebec
After a failed Canadian invasion known as the Battle of Quebec (December 1775 - May 1776) left much of the Continental Army beaten, sick and in retreat, the British hoped to quash rebellion once and for all by isolating the New England colonies from the other American colonies.
They also hoped to discourage potential American allies such as France from joining the fight. To accomplish this, the British Redcoats needed to take upstate New York and control the Hudson River.
In the spring of 1777, the British ordered three of their armies to merge in Albany, New York. Only one army, however, commanded by General John Burgoyne, made the final push to its destination. Waiting for them was the heavily-fortified Northern Department of the Continental Army, commanded by General Horatio Gates.
Did you know?
To celebrate the American victory at Saratoga, the Continental Congress issued a proclamation for a national day "for solemn Thanksgiving and praise," the first official holiday observance with that name.