The Military Archives, established in 1990, serves as the official repository for records related to the Irish Defence Forces and the Department of Defence. It is dedicated to preserving Ireland's military history and offers a wealth of resources for researchers and enthusiasts alike. The archives encompass a diverse range of collections, including the Bureau of Military History (1913-1921), the Collins Papers (1917-1922), and the Irish Army Census Collection.

Additionally, the Military Archives holds extensive digital and physical collections, featuring over 40,000 images, maps, and architectural plans that document military activities from the Revolutionary period to contemporary military operations. The archives also include oral histories, pension applications, and military intelligence reports.

With a reading room and various online collections, the Military Archives provides invaluable insights into Ireland's military heritage, making it an essential destination for academic research, family history inquiries, and public engagement with the nation's past.