Irish nationalists launch a Fenian invasion across the Niagara River into Canada from American soil
Armed Irish nationalists begin an invasion of Canada intended to force British concessions in Ireland. Fenian infantry under Union Army veteran Colonel John O'Neill crossed the Niagara River and arrived in the early hours of the morning at Fort Erie in present-day Ontario and hoisted the Fenian flag. The following day Canadian resistance would result in the Battle of Ridgeway nearby. (By John Osborne).
Patrick Steward, Bryan P. McGovern, The Fenians: Irish Rebellion in the North Atlantic World, 1858–1876 (Knoxville, TN: University of Tennessee Press, 2013), 124.