Christopher Andrew, Defend the Realm (2009), p. 605, calls O'Halpin "the leading historian of Irish security."
O'Halpin, Eunan. "MI5's Irish Memories: Fresh Light on the Origins and Rationale of Anglo-Irish Security Liaison in the Second World War." In Ireland and the Second World War: Politics, Society and Remembrance, eds. Brian Girvin and Geoffrey Roberts, 133-150. Dublin: Four Courts, 2000.
O'Halpin, Eunan. "'A poor thing but our own': The Joint Intelligence Committee and Ireland, 1965-72." Intelligence and National Security 23, no. 5 (Oct. 2008): 658-680.
The author concludes that "where Ireland was concerned the JIC system failed on several counts.... [T]he remarkable feature of the JIC's record in the years leading up to the outbreak of the Troubles is not how few but how many red herrings it pursued."
O'Halpin, Eunan. "Problematic Killing during the War of Independence and Its Aftermath: Civilian Spies and Informers." In Death and Dying in Ireland, Britain and Europe: Hostorical Perspectives, eds. James Kelly and Mary Ann Lyons, 317-348. Sallins: Irish Academic Press, 2013.
O'Halpin, Eunan. "The Secret Service Vote and Ireland, 1868-1922." Irish Historical Studies 23 (1983), 348-353.
O'Halpin, Eunan. "Small States and Big Secrets: Understanding Sigint Cooperation between Unequal Powers during the Second World War." Intelligence and National Security 17, no. 3 (Autumn 2002): 1-16.
The author discusses "signals intelligence ... understandings contemplated and arranged between Britain and smaller European states" during World War II. He focuses on deals with Ireland and Finland.
O'Halpin, Eunan. Spying on Ireland: British Intelligence and Irish Neutrality during the Second World War. Oxford: Oxford University Press, 2008.
Peake, Studies 54.3 (Sep. 2010) and Intelligencer 18.1 (Fall-Winter 2010), notes that the author studies "the intelligence relationship between [Irish] G-2 and [British] MI5-MI6," and explains, "in considerable detail, how it fit the political realities of wartime Ireland." This "is a very valuable contribution to the history of WWII intelligence." For White and Riley, Irish Studies in International Affairs 19 (2008), O'Halpin "highlights the intelligence cooperation between Ireland and Britain during the war" and emphasizes "the assistance the Irish government provided to the Allies."
O'Halpin, Eunan. "'Toys' and 'Whispers' in '16-land': SOE and Ireland, 1940-1942." Intelligence and National Security 15, no. 4 (Winter 2000): 1-18.
SOE plans for a stay-behind operation in Ireland, as well for a rumor-planting campaign, ran afoul of both MI5 and MI6 -- and of Churchill's reluctance to provide arms to the Irish.
O'Halpin, Eunan. "'Weird Prophecies': British Intelligence and Anglo-Irish Relations, 1932-3." In Irish Foreign Policy, 1919-66: From Independence to Internationalism, eds. Michael Kennedy and Joseph Morrison Skelly, 61-73. Dublin: Four Courts, 2000.
O'Halpin, Eunan, and Keith Jeffery. "Ireland in Spy Fiction." Intelligence and National Security 5, no. 4 (Oct. 1990): 92-116. And in Spy Fiction, Spy Films and Real Intelligence, ed. Wesley K. Wark. London: Cass, 1991.
O'Halpin, Eunan, ed. MI5 and Ireland, 1939-1945: The Official History. London: Frank Cass, 2002. Dublin: Irish Academic Press, 2003.
Doerries, JIH 9.1 & 2 (Summer 2010), notes that "[t]he 'Official History' presented in this highly interesting volume is, in fact, the history of the Irish Section [BIH] of MI5. The document ... was produced between the autumn of 1944 and the early days of 1946.... Eunan O'Halpin provides an excellent introduction for the contemporary historian as well as for future researchers possibly less informed on the internal makings of British intelligence in the 20th century.... [M]uch of this 'Note on the Work' is about: the fruitful cooperation of Irish and British intelligence [against the Germans] during World War II."
[OtherCountries/Ireland/WWII/OHalpin; UK/WWII/Overviews & Services/MI5]
OHalpin, Eunan, Robert Armstrong, and Jane Ohlmeyer, eds. Intelligence, Statecraft and International Power: Papers Read before the 27th Irish Conference of Historians Held at Trinity College, Dublin, 19-21 May 2005. Historical Studies 25. Dublin: Irish Academic Press, 2006.
According to Peake, Studies 52.1 (Mar. 2008) and Intelligencer 16.1 (Spring 2008), seven of the 15 articles presented here "discuss the history of Irish intelligence over four centuries.... The broad historical perspective ... on what works and what does not in intelligence will be of value to students of the profession as they search for answers to today's intelligence problems." Skelly, IJI&C 21.4 (Winter 2008-2009), finds that "[w]hile this collection's assessment of intelligence in Ireland is timely, an added benefit is its comparative framework.... Another advantage is its extended timeframe."
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