What drove an Irish American army to attack Canada five times after the end of the Civil War?

Was this some whiskey-fueled daydream or a serious military operation?

How did this band of revolutionaries change history forever?

David Rumsey Map Collection, www.davidrumsey.com

About Christopher

Christopher Klein is an author and freelance writer specializing in history. He writes stories about the past that inform us about the present and guide us to the future. A frequent contributor to History.com, he is the author of four books including When the Irish Invaded Canada.

About When the Irish Invaded Canada

When the Irish Invaded Canada is the outlandish, untold story of the Irish American revolutionaries who undertook one of the most fantastical missions in military history—to hold the British province of Canada hostage and ransom it for Ireland’s independence.

Also By Christopher Klein

Featured Article

History Channel Logo

JAN 17, 2019

See All the Crafty Ways Americans Hid Alcohol During Prohibition


Prohibition went into effect on January 17, 1920, officially banning the “manufacture, sale or transportation of intoxicating liquors” for beverage purposes in America. No law, however, could suddenly transform the United States into a country of teetotalers.

News & Events

When the Irish Invaded Canada
On Sale March 12, 2019!

“Thoroughly researched and engagingly written… A well-presented, little-known sidebar to the struggle for Irish independence.”

—Kirkus Reviews

Latest History Blog Post

The Harlem Hospital That Saved Martin Luther King, Jr.

January 24, 2019

A decade before Martin Luther King, Jr. was felled by a sniper’s bullet, he nearly died after being stabbed in the shoe section of a Harlem department store. The 29-year-old preacher had been sitting in…