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Whiting's parents died while he was a child, and he was raised by father's sister Mary and her husband, Reverend Thomas Clap. Whiting would graduate from Yale in 1743 while his uncle Thomas was president of the University.
In 1745 Ensign Nathan Whiting joined the New England army being raised to capture Fortress Louisbourg from the French. After his service in King George's War, he became a merchant in New Haven, Connecticut. In 1750 Nathan married Mary Saltonstall. They would have eight children together.
At the start of the French and Indian War, Whiting was appointed as Lieutenant Colonel of the 2nd Connecticut Militia Regiment. During the Battle of Lake George on September 8, 1755, Col. Whiting's Regiment and the Massachusetts regiment of Col. Ephraim Williams were marching between Lake George and Fort Edward 14 miles away, when their column was ambushed by an army of French and their Indian allies. With the death of Col. Williams, Col. Whiting led the survivors back to Sir William Johnson's camp at Lake George. There the Colonial army held off the French attacks until men from Joseph Blanchard's New Hampshire Provincial Regiment attacked the rear of the French army and captured the French commander Jean Erdman, Baron Dieskau.
- Welles, Lemuel Aiken (1900). "Letters of Col. Nathan Whiting, Written from Camp During the French and Indian War". In Papers of the New Haven Colony Historical Society, Vol. VI, p. 133. New Haven: New Haven Colony Historical Society.
- Welles (1900), p. 139.
- Welles (1900), p. 150.