Record Data Place Unit Type City or Town Containing Unit Canada West (Ontario) Events Date Type 06/02/1866 In southern Ontario, Fenian invaders push back Canadian militia at the Battle of Ridgway Battles/Soldiers 06/01/1866 Irish nationalists launch a Fenian invasion across the Niagara River into Canada from American soil US/the World 06/03/1866 On the Niagara River, U.S. naval units arrest Fenian invaders as they retreat back into the United States US/the World People Documents Images