This Info Flash outlines the critical security aid that has reached Kyiv from the European members of the NATO alliance. Ukraine has welcomed this aid from its European counterparts, but the nation’s president, Volodymyr Zelensky, has continuously pressed European leaders to allow the transfer of their main battle tanks (MBTs) to help push back Russian forces. This request has ignited debates among policymakers and analysts about whether MBTs would make a difference for Ukraine on the battlefield and whether states should grant Zelensky’s request for tanks. As a result, the policies of European NATO members regarding MBT transfers have been mixed since February 2022. Some European NATO members quickly supplied Ukraine with MBTs, while others have only recently given the green light to transfer MBT units.