How were arms deliveries to Ukraine (de)legitimized in the German Bundestag? This paper is based on a discourse analysis of parliamentary debates held between December 2021 and January 2023 on the question of military support for Ukraine. It shows how the legitimization of arms deliveries and various identity narratives of German foreign policy are mutually constitutive but also reconfigured. Members of Alliance 90/The Greens, the Free Democratic Party, and the Christian Democratic Union/Christian Social Union legitimized arms deliveries by referring to Germany’s identity as a European “shaping power” from which a “responsibility” to provide military support was derived. Ukraine had become part of the Western European community; therefore, arms deliveries were necessary to defend the European “we” against the Russian aggression. Criticism of arms deliveries was voiced by The Left, who emphasized Germany’s pacifist identity, which had been established as a lesson from National Socialism and should not be abandoned. The Alternative for Germany party also rejected any military support, pointing to the negative consequences for economic relations with Russia and openly questioning the legitimacy of Ukrainian statehood, as Putin derives geopolitical claims over Ukraine that “must be respected.” The most radical change was observed within the Social Democratic Party parliamentary group. Just a few weeks after his appearance in the Bundestag, Scholz and his parliamentary group mobilized a vocabulary that was less associated with “Zeitenwende” and more with Germany’s traditional identity as a “civilian power” in order to legitimize a “balanced” approach so that “Russia does not win” but Germany is not dragged into the war either.