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.

Watch the Trailer

Also By Christopher Klein

Featured Article

History Channel Logo

MAR 14, 2019

When Irish-Americans Attacked Canada—With the White House's Blessing


These Civil War veterans orchestrated one of the most audacious acts in American history.

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

New York City Event for When the Irish Invaded Canada

March 26, 2019

Did you know that after the Civil War an Irish-American army attacked Canada with the plan of holding it hostage and ransoming it for Ireland’s independence? It’s no blarney. The self-proclaimed Irish Republican Army invaded…