Contact with Europeans in the early 17th century had a profound impact on the economy of the Iroquoians. At first, they became important trading partners, but the expansion of European settlement upset the balance of the Iroquois economy. By 1800, following the American Revolutionary War, in which most of the nations supported the British and had to share their defeat, the Iroquois were reduced to reservations, primarily in New York in the United States, and Quebec and Ontario in Canada. They had to adapt their traditional economic system to dramatic changes. In the 20th century, some of the Iroquois nations in the United States have benefited from their sovereign status by founding gambling and recreation facilities, which have yielded greater revenues than some other enterprises. Individually, Iroquois have also become part of the larger economies in cities off the reservation.