Michael T. Foy is an Irish historian specializing in the Irish revolutionary period. He is best known for *Michael Collins's Intelligence War: The Struggle Between the British and the IRA 1919-1921* (2006), a detailed examination of the intelligence operations during the Irish War of Independence. Foy's work is characterized by meticulous research and focus on military and intelligence history, drawing extensively on primary sources to analyze the strategic dimensions of Ireland's fight for independence. His scholarship contributes significantly to understanding the role of intelligence gathering and guerrilla warfare in the Irish revolutionary period. He co-authored *The Easter Rising* (1999) with Brian Barton, further establishing his expertise in early twentieth-century Irish history.