A month after the first open armed conflict in Lexington, the Continental Congress resolved on May 25, 1775 to build fortifications in the Hudson highlands for the purpose of protecting and maintaining control of the Hudson River.
James Clinton and Christopher Tappan, lifetime residents of the area, were sent to scout appropriate locations.
Clinton was commissioned as the colonel of the 3rd New York Regiment, which took part in Brig.
Gen. Richard Montgomery’s unsuccessful expedition to Quebec in 1775.
In March 1776, Clinton took command of the 2nd New York Regiment and soon after, in August, was promoted to brigadier general in the Continental Army.

He served most of the war in the Northern Department, along the New York frontier.
 During the Saratoga Campaign in 1777, he commanded Fort Clinton in the Hudson Highlands.
He participated in a successful effort to prevent British General Sir Henry Clinton from rescuing General John Burgoyne at Saratoga, but he and his troops were unable to hold Forts Clinton and Montgomery.
Clinton sustained a bayonet wound in the leg during the assault.
In 1778 he was stationed in Albany to oppose Indian and Tory forces.

In 1779, Clinton led an expedition down the Susquehanna River after making the upper portion navigable by damming up the river's source at Otsego Lake, allowing the lake's level to rise, and then destroying the dam and flooding the river for miles downstream.
 This event is described by James Fenimore Cooper in the introduction to his popular novel The Pioneers, and commemorated by a Memorial Day canoe race.

At Tioga, New York, Clinton met up with General John Sullivan's forces, who had marched from Easton, Pennsylvania.
Together, on August 29, they defeated the Tories and Indians at the Battle of Newtown (near today's city of Elmira, New York).
This became known as the "Sullivan-Clinton Campaign" or the "Sullivan Expedition."

In 1780, Clinton temporarily commanded the Northern Department.
By October 1781, his brigade had joined George Washington's army in the siege of Yorktown.
A month after the first open armed conflict in Lexington, the Continental Congress resolved on May 25, 1775 to build fortifications in the Hudson highlands for the purpose of protecting and maintaining control of the Hudson River. James Clinton and Christopher Tappan, lifetime residents of the area, were sent to scout appropriate locations. Clinton was commissioned as the colonel of the 3rd New York Regiment, which took part in Brig. Gen. Richard Montgomery’s unsuccessful expedition to Quebec in 1775. In March 1776, Clinton took command of the 2nd New York Regiment and soon after, in August, was promoted to brigadier general in the Continental Army.
He served most of the war in the Northern Department, along the New York frontier.  During the Saratoga Campaign in 1777, he commanded Fort Clinton in the Hudson Highlands. He participated in a successful effort to prevent British General Sir Henry Clinton from rescuing General John Burgoyne at Saratoga, but he and his troops were unable to hold Forts Clinton and Montgomery. Clinton sustained a bayonet wound in the leg during the assault. In 1778 he was stationed in Albany to oppose Indian and Tory forces.
In 1779, Clinton led an expedition down the Susquehanna River after making the upper portion navigable by damming up the river's source at Otsego Lake, allowing the lake's level to rise, and then destroying the dam and flooding the river for miles downstream.  This event is described by James Fenimore Cooper in the introduction to his popular novel The Pioneers, and commemorated by a Memorial Day canoe race.
At Tioga, New York, Clinton met up with General John Sullivan's forces, who had marched from Easton, Pennsylvania. Together, on August 29, they defeated the Tories and Indians at the Battle of Newtown (near today's city of Elmira, New York). This became known as the "Sullivan-Clinton Campaign" or the "Sullivan Expedition."
In 1780, Clinton temporarily commanded the Northern Department. By October 1781, his brigade had joined George Washington's army in the siege of Yorktown.
James Clinton