The Fenian Rising of 1867 was a poorly prepared and badly fragmented rebellion against British rule in Ireland. It was organised by the Irish Republican Brotherhood (IRB), a radical nationalists group under the leadership of James Stephens. After the end of the American Civil War, the IRB hoped to recruit willing Irish veterans of that war for an insurrection in Ireland. They also planned a mutiny of Irish troops serving in the British army in Dublin, who would take over all military barracks. By 1865, they had collected about 6,000 firearms and a force of some 50,000 men. The plan was for a country-wide guerrilla campaign accompanied by an uprising in Dublin. However, because of British infiltration, the rebellion never got off the ground. Most of the leaders in Ireland had already been arrested, but although some of them were sentenced to death, none were executed. James Stephens, the leader of the movement, later escaped, but by that time, the rebellion had failed. However, the Fenian proclamation of a Provisional Republican government had symbolic significance. A plot to rescue Fenian prisoners in Manchester resulted in the death of a police sergeant. Three Fenians who were later executed, became known as the "Manchester Martyrs." Their execution provoked an emotional reaction among the Irish public. The Fenians re-organised to plant the seed that led to the Easter Rising in 1916.