This paper explores how Ukrainian virtual museums of war are embedded in today's connective environment of humans, codes and algorithms. In particular, I examine the ways virtuality as a mode of memory-making is deployed by the Meta History: Museum of War to shape the mediation and remembering of the full-scale Russian war against Ukraine as it unfolds. Using digital methods and digital ethnography, this study maps the emerging assemblage of the Meta History: Museum of War to grasp how the museum is contributing to efforts to repel the Russian invasion through its artistic and material engagement with the war. By exploring the network of exhibitions and the museum's virtual infrastructure, the study illustrates how the museum generates affective instant memories in order to wield influence over events that will in turn be exhibited in the future. Consequently, it adds valuable insights into the production of virtual engagement with war.