During a speech at Oxford University, Brantner argued that Germany must adopt stronger commitments to integrate its military within a European framework, emphasizing the need for collaborative decision-making on military actions. This stance has drawn criticism from various political factions, including the CDU and AfD, who contest the existence of significant unease among neighboring countries. Security experts have expressed divergent views, with some supporting Brantner’s call for cooperation while others assert that Germany’s military presence is already adequately integrated within NATO structures.