Inside the US War Plans to Invade Canada

A military blueprint to attack Canada has been on the books for almost a century now. Former Washington Post feature writer Peter Carlson recounts how he came across it 20 years ago.

In 1930, the U.S. crafted a top secret plan to invade Canada, as mapped out here. Amid rising tensions today—and as crazy as it sounds—the Trump administration may well be dusting off it’s own version. (Princeton Architectural Press map)

ONE DAY IN 2005, WHEN I WAS A REPORTER FOR THE WASHINGTON POST, I was in the National Archives, researching a story th…