This article elucidates the role of historians in times of war and the peculiarities of popular history narratives written by historians who became activists. The article focuses on historians who call themselves “Likbez. Historical Front.” This cohort gave rise to a new professional species—activist historians—who are different from so called memorians or propagandists, who work in service of authorities. Likbez historians tried to use their power to influence and promote their activist agenda not only in the realm of memory and history but also in reformation of state institutions. I argue that for Likbez historians, securitization of the past is the main strategy employed for producing historical knowledge. Historians’ work is a part of postcolonizing process observed in Ukrainian society since the Maidan protests. As the analysis shows, popular history narratives written with an open activist agenda are a result of many compromises made by scholars in the intersection of several factors: professional ambitions, political and civic aims, social and political context, popular expectations, and market environment. In line with the increased attention to agency in memory studies, this article demonstrates that historians have a much more nuanced relation to power than straightforward opposition or co-option.