The Raid on Saint John took place on 27 August 1775 during the American Revolutionary War. The raid involved American privateers from Machias, Massachusetts Bay attacking Saint John, Nova Scotia. The privateers intended to stop the export of supplies being sent to the loyalists in Boston. This raid was the first hostile act committed against Nova Scotia and it resulted in raising the militia across the colony.

The Bay of Fundy is a bay between the Canadian provinces of New Brunswick and Nova Scotia, with a small portion touching the U.S. state of Maine. It is an arm of the Gulf of Maine. Its tidal range is the highest in the world. The name is probably a corruption of the French word fendu, meaning 'split'.