This article shows how war is restructuring the configuration of religious life in Ukraine as a result of Russia’s full-scale invasion. Following a short introduction, which documents churches’ initial reactions to the war, I focus on three issues. First, I examine the ways in which the war exacerbates existing tensions within Ukrainian Orthodoxy, echoing the divide within world Orthodoxy. Second, I analyse the challenges faced by Ukrainian Catholics in relation to the Holy See’s position on the war, which is marked by neutrality and a propensity towards nonviolence. Third, I delineate a few trajectories, which could allow churches to be more proactive in playing a role in peacemaking and future reconciliation.