As a member of Congress , Sullivan worked closely with the US Ambassador the Chevalier de la Luzerne .
He commanded the Sullivan Expedition in 1779 , a scorched earth campaign against the Iroquois towns that had taken up arms against the American revolutionaries .
As a member of Congress , Sullivan worked closely with the American Ambassador the Chevalier de la Luzerne .
He commanded the Sullivan Expedition in 1779 , a scorched earth campaign against the Iroquois towns that had taken up arms against the American revolutionaries .