The Collection of World War I Cossack soldiers postcards, 1914, comprises a complete set of 12 postcards from artist K. Govoiarov depicting the adventures of a Cossack. Postcards display mobilization, military progress through Poland and Austria, arrival in Berlin, demobilization, and return to Russia of a Cossack soldier. Noted in verso, postcards were published as a fundraiser for orphans of the lower-rank soldiers of the Army and Navy.

The manuscript diaries of Surgeon Lieutenant George Marshall Oakden, who served in the British Navy from 1914 to 1919, and the letters of his brother, Arthur, who died in the Gallipoli Campaign in 1915.

A four-volume illustrated memoir, in scrapbook form, of the World War I military service of Humphrey M. Barbour, an artillery officer in the American Army's 42nd (Rainbow) Division. In addition to a 220-page typescript memoir the volumes contain close to 1000 photographic prints, postcards, published halftones, maps, manuscript military records, and drawings relating to Barbour's service, 1917 to 1919.

A collection of letters addressed to Julia Pomeroy Brown from three women: Constance L., Emily Drummond, and Elizabeth Spooner. Letters detail life during WWI, the sinking of the Lusitania, and the death of a British soldier.

A series of documents and letters from Jutta Schütt, Rose Elvira Grandinetti, Nicholas Emerson Dante Russo, and others, beginning in July 1916 and ending in July 1939.

A collection of personal letters written by Arthur Le Rossignol to his sister, Ethel, while he served in the British Motor Machine Gun Corps on the Western Front during World War I. Also included are letters written by Ethel, her colleague Pierre Pulinekse, and others.

The correspondence and other papers of the American Lenore Mooney (1859-1941), dating especially from her time as a relief worker in Paris during World War I. There are many letters to Mooney from French soldiers and others victimized by the war, as well as a substantial correspondence with nephew Charles E. Bayly, Jr., an ambulance driver with the American Field Service who subsequently served as sous-lieutenant in the French army.

Three idiosyncratic manuscript journals of deeply cynical leftist political commentary, written by an unidentified Irish-American resident of Pittsburgh, ca. 1922-1932. The journals treat local, national, and international affairs, contemporaneous and historical: there is much on World War I, Ireland, and American politics generally. The volumes are illustrated with some 750 drawings, many of them portraits.

This collection chiefly consists of the correspondence and personal papers of Richard Henry Tawney relating to his service in World War I. Personal, government, and Army correspondence are included, as well as military and government records. Correspondence are present in the form of letters, telegrams, and postcards. Notes and hand-drawn battlefield maps are also included.

Two-volume scrapbook containing original drawings and text for In Ruhleben Camp (1915) and The Ruhleben Camp Magazine (1916-1917) compiled possibly for postwar publication. The satirical drawings and writings deal with life of British civilians interned in a German prisoner camp in Ruhleben, Germany. Two bound volumes of the published camp magazine accompany the scrapbook.

A letter written by British soldier S.L. Kelsall to his sister detailing his participation in WWI in September 1918. He describes the hygenic conditions of the Western Front and a battle against German forces.