This collection contains materials collected by David Trotsky relating to the Jewish community of Belgium in the inter-war period. Materials include printed documents, posters, reports, meeting minutes, and newspaper clippings, mainly pertaining to the Jews of Brussels and Antwerp.

Established in 1912 in St. Petersburg by a group of Jewish doctors, lawyers and prominent public figures, OZE sought to create an all-Russian Jewish welfare system with the goal of promoting the study and knowledge of medical and sanitary practices, detecting and curing diseases among Jews, preventing epidemics, and creating living conditions conducive to the normal physical and mental development of Jewish children. TOZ, established in Poland in 1921, remained closely associated with OZE and shared the same program of activities. Because of World War I and its disarraying consequences, especially in the eastern regions of the Polish state, TOZ concentrated its relief efforts primarily on battling contagious diseases and epidemics caused by poverty, malnourishment and the deplorable sanitary conditions of the Jewish population. The collection is of mixed provenance and fragmentary nature, and consists of miscellaneous materials that relate to the activities of OZE and TOZ in Eastern Europe, and to some extent, in Western Europe.

This collection contains correspondence, pamphlets, periodicals, newspapers, press releases, writings, clippings, brochures, fliers, and posters from the era of the Spanish Civil War, and later, documenting American and international fund-raising for humanitarian relief of Republican Spain; American and international public opinion about the war; the participation of Jews in the International Brigades; and reminiscences and commemorations of the war and, particularly, of the International Brigades, in later years. A portion of the material on relief work pertains to trade union activities, as documented in papers of Charles S. Zimmerman, of the International Ladies’ Garment Workers’ Union, in his capacity as leader of Trade Union Relief for Spain, in New York City. Other organizations represented include the Medical Bureau and North American Committee to Aid Spanish Democracy; the Spanish Information Bureau in New York; the Friends of the Abraham Lincoln Brigade; and the Israeli branch of the association of volunteers in the International Brigades. There are also autobiographical manuscripts by Benjamin Lubelski and Sigmund Stein, who participated in the International Brigades; and contemporary publications in a variety of languages, including publications of the anarchist-leaning Spanish trade union confederations CNT-FAI.