Until April 27, 2016, you can view 75,000 British War Office records of the Easter Rising and the Irish War of Independence for free on Findmypast.com. The website also has over 10 million free Irish Catholic Parish records.
The Easter Rising (Irish: Éirí Amach na Cásca) was the most significant armed action since the rebellion of 1798. Here are some websites that will give the history and background of the Easter Rising and the subsequent War of Independence.
Augusteijn, Joost. From Public Defiance to Guerrilla Warfare: The Experience of Ordinary Volunteers in the Irish War of Independence, 1916-1921. Dublin: Irish Academic Press, 1996.
Brennan, Michael. The War in Clare, 1911-1921: Personal Memoirs of the Irish War of Independence. Dublin: Four Courts Press : Irish Academic Press, 1980.
Coogan, Tim Pat, and Rogers D. Spotswood Collection. 1916: The Easter Rising. London: Cassell, 2001.
Easter Rising. Left Field Media, 2011.
“Easter Rising.” Wikipedia, the Free Encyclopedia, April 15, 2016. https://en.wikipedia.org/w/index.php?title=Easter_Rising&oldid=715454029.
“Easter Rising | Irish History | Britannica.com.” Accessed April 18, 2016. http://www.britannica.com/event/Easter-Rising.
Edwards, Owen Dudley, and Fergus Pyle. 1916: The Easter Rising; London: MacGibbon & Kee, 1968.
Foy, Michael, and Brian Barton. The Easter Rising. Stroud, Gloucestershire: Sutton, 1999.
Harris, Nathaniel. The Easter Rising. London: Dryad, 1987.
Hopkinson, Michael. The Irish War of Independence. Montreal; Ithaca: McGill-Queen’s University Press, 2002.
“Irish War of Independence.” Wikipedia, the Free Encyclopedia, April 14, 2016. https://en.wikipedia.org/w/index.php?title=Irish_War_of_Independence&oldid=715157795.
Kautt, William H. Ground Truths: British Army Operations in the Irish War of Independence, 2014. http://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=753858.
Killeen, Richard. The Easter Rising. New York: Thomson Learning, 1995.
Leeson, David. The Black and Tans: British Police and Auxiliaries in the Irish War of Independence, 1920-1921. Oxford: Oxford University Press, 2011.
Martin, F. X. Leaders and Men of the Easter Rising: Dublin 1916. Ithaca, N.Y.: Cornell University Press, 1967.
McKenna, Joseph. Guerrilla Warfare in the Irish War of Independence, 1919-1921. Jefferson, N.C.: McFarland & Co., 2011.
Moran, Seán Farrell. Patrick Pearse and the Politics of Redemption: The Mind of the Easter Rising, 1916. Washington, D.C.: Catholic University of America Press, 1994. http://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=46441.
Moylan, Seán, and Aubane Historical Society. Seán Moylan, in His Own Words: His Memoir of the Irish War of Independence, with a Selection of Speeches and Poems. Aubane, Millstreet, Co. Cork: Aubane Historical Society, 2004.
O’Farrell, Padraic. Who’s Who in the Irish War of Independence, 1916-1921. Dublin: Mercier Press, 1980.
———. Who’s Who in the Irish War of Independence and Civil War, 1916-1923. Dublin: Lilliput Press, 1997.
Sheehan, William. British Voices from the Irish War of Independence 1918-1921: The Words of British Servicemen Who Were There. Doughcloyne, Wilton, Cork: Collins Press, 2005.
Trotsky, Leon, and Revolutionary Communist League. The Easter Rising. [London]: [Revolutionary Communist League], 1970.
Ward, Alan J. The Easter Rising: Revolution and Irish Nationalism. Arlington Heights, Ill.: AHM Pub. Corp., 1980.