{"p"=>"This article examines how wartime mobility shapes trust in the police during Russia's full-scale invasion of Ukraine. Existing scholarship has usually examined internally displaced persons, returnees, and non-displaced residents separately. We bring these trajectories into a single analytical frame and develop the concept of displacement-shaped legitimacy: the idea that police legitimacy is reconfigured through mobility, dependence on state institutions, visibility to public authority, and uneven exposure to insecurity. Drawing on open-ended responses from three waves of the Security and Trust Survey conducted in Kharkiv in 2022, 2023, and 2024, the article compares internally displaced persons (IDPs), returnees, and emplaced residents. The findings show that IDPs often report higher police trust, but this should not be read as straightforward institutional legitimacy. It reflects a more ambivalent form of functional trust produced by vulnerability, constrained choice, and reliance on visible state actors. By contrast, non-displaced residents' lower trust reflects cumulative exposure to insecurity and frustration with routine order maintenance under wartime strain. Returnees occupy an intermediate position, articulating increasingly concrete expectations of recovery, accountability, and normalised policing. The article contributes to police legitimacy theory by showing that legitimacy thresholds are not only procedurally produced but also spatially and temporally recalibrated through mobility. It also identifies practical and policy implications for civilian policing under prolonged emergency conditions."}