Résumé : The data was collected in, 2020, in the context of a doctoral thesis in social and cultural psychology at the University of Brussels, Belgium. Thesis title: Were we all victims and perpetrators? How national and religious identifications and processes of victimhood and responsibility attributions for the civil war affect present-day intergroup relations in Lebanon. This thesis aims to study the role of ingroup identification in shaping construals of group victimhood and responsibility attributions, in addition to the impact of these factors on intergroup relations. We choose to study this phenomenon in the context of the Lebanese civil war, in Lebanese citizens currently residing in Lebanon, evaluating two types of ingroup identification (national and religious) in the two main religious groups (Christians and Muslims). Quantitative data collected via online survey among Lebanese citizens currently residing in Lebanon. This project aimed to assess how construals of victimhood and responsibility and collective emotions are expressed after being exposed to ingroup past events, related to the Lebanese civil war, in addition to the impact of group membership and identification on this process. Method of data collection (sample description, procedure, variables scales and items), and a codebook (variables names and their code explained, to better understand the csv and sav data files) are provided. CMLCW P2: Collective Memory of The Lebanese Civil War (project acronym) Project #2 (the thesis included 5 projects/Datasets).