Easter Rising in putting the rising off for only a day, although it greatly reduced the number of Volunteers who turned out. British Naval Intelligence had been aware of the arms shipment, Casement's return, and the Easter date for the rising through radio messages between Germany and its embassy in the United States that were intercepted by the Royal Navy and deciphered in Room 40 of the Admiralty. The information was passed to the Under-Secretary for Ireland, Sir Matthew Nathan, on 17 April, but without revealing its source, and Nathan was doubtful about its accuracy. When news reached Dublin of the capture
History of Ireland (1801–1923) with militant republicanism, particularly Irish-American republicanism. It was from the former Irish Volunteer ranks that the Irish Republican Brotherhood organized an armed rebellion in 1916. Because of divisions among the Volunteer leadership, only a small part of their numbers was mobilized. Indeed, Eoin MacNeill, the Volunteer commander, countermanded orders to units to begin the insurrection. Nevertheless, at Easter 1916, a small band of 1500 republican rebels (Volunteers and Irish Citizen Army) staged a rebellion, called the "Easter Rising" in Dublin, under Padraig Pearse and James Connolly. The Rising was put down after a week's fighting. Initially their acts were widely