In Ireland the movement was led by JamesStephens? (1825–1901), who founded the party organ, the Irish People, in Dublin in 1863. The movement made its chief appeal to artisans and shop assistants rather than to the agrarian population. The opposition of the Roman Catholic Church to the society doubtless kept many potential members from joining its ranks. As the movement became stronger and rumors of actual plots arose, the British government took steps to crush it. In 1865 the Irish People was suppressed and Stephens was arrested, although he escaped to America. In 1866 the Habeas Corpus Act was suspended in Ireland, and many Fenians were imprisoned. Initiative shifted to America, where a huge store of arms and money had been accumulated by the Fenians, and where many Irish-American Civil War veterans were eager to strike a blow against England. In 1867 a ship, renamed Erin's Hope, was outfitted and sailed to Ireland, but the Fenians aboard were captured in their attempt to land. In the same year there were several small-scale risings in Ireland. Repeated attempts by the revolutionists to free their imprisoned comrades by force resulted in the execution of several Fenians. Agitation continued, and terrorism was condoned by many as a result of the anger aroused by the executions. The long-range effect of the Fenian movement was to draw the attention of the English Parliament to Irish problems. The Fenian movement continued until World War I, but its influence was largely drawn off into new organizations, notably Sinn Féin, founded by Arthur Griffith, a former Fenian.
From G.A.Hayes-McCoy, Irish Battles: A Military History of Ireland; Martin Wallace, A Little History of Ireland. This text from Ireland's Eye.
After this period, the Fenian movement largely developed from the United States, in particular with the group ClanNaGael [properly Clan na Gael, but here ClanNaGael for wiki purposes]. The Clan was central to the development of the 1880s DynamiteWar.
The Dynamite War
The DynamiteWar of the 1880s was essentially a series of battles between agents of various IrishFenian organizations, mostly based in the United States, and the MetropolitanPolice. The Fenians hoped to do enough damage and occasion enough expense and trouble within London and elsewhere that the British government would become overtaxed and would need to retract some of its grip on Ireland itself. This would then permit a general rising to succeed in that country. At the same time, there were a great many different theories, plans, organizations, and individuals involved, and it's not possible simply to explain the whole thing with one view.
The Main Events
Organizations and People
References
Short, K.R.M. The Dynamite War: Irish-American Bombers in Victorian Britain. Atlantic Highlands, NJ: Humanities Press, 1979. Excellent and extremely readable.