The 1779 Sullivan Expedition, also known as the Sullivan-Clinton Expedition, Sullivan Campaign, and Sullivan-Clinton Genocide was an extended systematic military campaign, ordered by George Washington and conducted by the Continental Army, during the American Revolutionary War against Loyalists and the four Nations of the Haudenosaunee which had sided with the British. It has been described as a genocide due to the magnitude and totality of its violence towards and destruction of the Haudenosaunee. The Americans rationalized the campaign as a response to attacks on Wyoming and Cherry Valley by the British-allied Haudenosaunee in 1778.