This Week on History Happy Hour: A year after the Civil War, a band of Union and Confederate veterans dusted off their guns. Not to fight each other, but side by side to undertake one of the most fantastical missions in military history: to seize the British province of Canada and to hold it hostage until the independence of Ireland was secured. This motley crew of revolutionaries, including a one-armed war hero, an English spy, and a radical who staged his own funeral, launched their unlikely assault from Buffalo - with unexpected results.

Chris and Rick welcome Christopher Klein to talk about his new book: When the Irish Invaded Canada.

CHRISTOPHER KLEIN is the author of four books, including Strong Boy: The Life and Times of John L. Sullivan, America’s First Sports Hero. A frequent contributor to History.com, Christopher has also written for The Boston Globe, The New York Times, National Geographic Traveler, Harvard Magazine, Smithsonian.com, and AmericanHeritage.com. He lives in Andover, Massachusetts.