Starting in 1965, Canada became a choice haven for American draft dodgers and deserters.
In 1971 and 1972 Canada received more immigrants from the United States than from any other country.
Estimates of the total number of American citizens who moved to Canada due to their opposition to the war range from 50,000 to 125,000 This exodus was "the largest politically motivated migration from the United States since the United Empire Loyalists moved north to oppose the American Revolution.
(needs a new thread, illegal US immigration ) ! LOL