The following is an article from Uncle John's Curiously Compelling Bathroom Reader.
(Image credit: Flickr user Library and Archives Canada)
When this bizarre story surfaced a few years ago, it reminded us if this quote, attributed to Warren G. Harding: "I can take care of my enemies all right. But my damn friends -they're the ones that keep me walking the floors nights."
NORTHERN EXPOSURE
If you had to invade another country, how would you do it? Believe it or not, the United States military spent a lot of time pondering that question in the late 1920s, when it came up with a plan to invade its closest neighbor, Canada.
There was certainly a precedent for the two nations battling it out. The Continental Army invaded Canada during the American Revolution, and the U.S. Army made repeated incursions during the War of 1812. In 1839 the state of Maine only narrowly avoided a shooting war with the province of New Brunswick over a border dispute. Then, in 1866, about 800 Irish-American members of a group called the Fenian Brotherhood tried to occupy part of Canada for the purpose of using it as a bargaining chip to force Great Britain to grant independence to Ireland (They were quickly driven back across the U.S. border).
That last invasion had an upside for Canadians: It convinced the last holdouts in the independent provinces of New Brunswick, Nova Scotia, Ontario, and Quebec that they'd be better able to defend themselves against the next invasion if they banded together to form the Dominion of Canada, which they did on July 1, 1867.
Canadian soldiers in World War I. (Image credit: National Library of Scotland)
TO THE DRAWING BOARD
Of course, these skirmishes paled in comparison to World War I, which raged from 1914 to 1918. That war, which was precipitated by the assassination of Archduke Ferdinand of Austria, caught most of the belligerents by surprise. It also lasted longer and was far more costly in blood and treasure than anyone ever dreamed a war could be. None of the nations that fought in it wanted to be caught off guard again; many began planning for whatever war might be lurking around the corner. The American military drafted a whole series of color-coded war plans to cover just about every conceivable scenario: War Plan Black was a plan for war with Germany; War Plan Orange dealt with Japan, a rapidly growing power in the Pacific. Other colors included Green (Mexico), Gold (France), Brown (The Philippines), and Yellow (China). There was even a War Plan Indigo, in case the United States eve had to invade Iceland, and a War Plan White that dealt with civil unrest within America's own borders.