This collection consists largely of letters from Roger Casement to Captain Hans Boehm, during Casement's stay in Germany in 1915, as well as some associated material (photographs, medals) relating to his first contact with the German authorities in November and December 1914 and the formation of the Irish Brigade in 1915.

The dataset comprises a tabular listing of student and staff of University College Dublin who participated in, and died in, World War I. The data was derived by Conor Mulvagh fom two sources: The National University of Ireland War List, "Roll of Honour," and the Commonwealth War Graves Commissions database of war dead.

A collection of postcards depicting images from World War I. The descriptive titles on the front of the postcards are in French and / or Irish while the text on the reverse of each postcard is in Irish.

The newspaper, called ‘The Kangaroo’, was produced on board the troopship HMAT Afric, which carried men of the 1st battalion Australian Imperial Force (AIF), from its departure from Sydney on the 19th October 1914 until its arrival in Alexandria, Egypt on the 3rd December 1914. The newspaper was edited by Walter Wade, an Irish-born soldier in the AIF. This collection represents twenty-three issues of the paper, comprising of most issues published, along with variant editions and duplicates. There are gaps in the daily publication record, but this collection does have copies that are absent from other nationally significant holdings of ‘The Kangaroo’ extant in Australian libraries.

The year 1916, and the events that occurred during it, can mean multiple things to different people. By asking 'what does 1916 mean to you?', this collection explores the political, social, and cultural legacies of the year 1916 in the construction of identity and historical consciousness among people and communities across the island of Ireland, north and south. The collection consists of recorded interviews with various individuals (academics, community leaders, politicians, artists, writers and members of the public) giving their views on the significance of the events of 100 years ago, and also on the meaning of commemoration. '1916 and Me/2016 and Us' is a collaboration between University College Dublin School of History, Queen's University Belfast School of History and Anthropology, UCD Digital Library, and HistoryHub.ie, UCD's public history website. The project was funded by the Department of Foreign Affairs Reconciliation Fund, and involved the recording of a number of short interviews with people talking about what 1916 means to them during the centenary year of 2016.

This collection consists of files relating to Irish Lights during World War I, and the Irish War of Independence and Civil War, covering the period 1914-1931. The files contain reports, letters and telegrams from Lightkeepers and other Irish Lights personnel around the coast; correspondence with the government and state bodies including the British Army and Navy, members of Dail Eireann and the new Departments of the State; and instructions, memoranda and official documents issued to Irish Lights by Government Departments and State bodies. Topics covered include reducing or extinguishing lights ; submarine sightings and attacks ; rescue of shipwrecked crews; and raids on lighthouses.

A collection of papers belonging to Fr. Francis A. Gleeson relating to his time as Catholic Military Chaplain to the 2nd Battalion Royal Munster Fusiliers during World War I. The papers include diaries detailing life at the front and religious activities, Brigade Rolls listing mainly Roman Catholic soldiers, and correspondence from the families of men missing or killed in action.