Led by John O'Mahony, this Fenian raid occurred in April 1866, at Campobello Island, New Brunswick. A Fenian Brotherhood war party of over 700 members arrived at the Maine shore opposite the island intending to seize Campobello from the British. British commander Charles Hastings Doyle, stationed at Halifax, Nova Scotia responded decisively. On 17 April 1866 he left Halifax with Royal Navy warships carrying over 700 British regulars and proceeded to Passamaquoddy Bay, where the Fenian force was concentrated. This show of British might discouraged the Fenians, and they dispersed. The invasion reinforced the idea of protection for New Brunswick by joining with the British North American colonies of Nova Scotia, and the United Province of Canada, formerly Upper Canada (now Ontario) and Lower