Croatia is jeopardizing Montenegro’s path to European Union membership by demanding billions of euros related to disputed Yugoslav-era military assets. The dispute centers around disagreements between Croatia and Montenegro, particularly concerning the delineation of the border in the southern Adriatic Sea. The financial claim stems from assets formerly held by the Yugoslav People’s Army. This escalating bilateral issue introduces a significant obstacle for Montenegro as it continues its EU accession process. Croatia's demands are creating tension and uncertainty, potentially delaying Montenegro’s integration into the bloc. Negotiations are ongoing, but a resolution remains elusive, casting a shadow over Montenegro’s EU aspirations.