The University of Luxembourg's “WARLUX” project focuses on studying the biographies of young Luxembourgers who were conscripted into German forces during World War II under the Nazi German occupation. Through participatory contributions and crowdsourcing, the research team has created a unique collection that is typically inaccessible through official institutions. This citizen science endeavour emphasises the involvement of families and the public in collecting historical data, reshaping historiography and providing a fresh understanding of the war. The interaction between researchers and contributors, particularly the families, has mutually benefited both parties, amplifying voices and uncovering fascinating personal histories. This collaborative approach contributes to a comprehensive exploration of the war's impact.