A German court is trying former Ukrainian officer Serhii Kuznetsov for his alleged role in coordinating the September 2022 Nord Stream pipeline sabotage. Prosecutors claim the operation was conducted on behalf of Ukrainian state authorities, though Kyiv denies any involvement, and no higher political leadership role has been established. The trial is expected to be politically explosive and could intensify disputes in Germany over continued military aid to Ukraine. German investigators believe Kuznetsov was the ringleader of a group of Ukrainian divers who planted explosives. The indictment suggests the goal was to permanently halt gas deliveries and prevent Russia from financing its war. Kuznetsov denies the charges, and his lawyer calls the evidence weak. Another suspect, identified as Vladimir Z., is fighting extradition from Croatia. The trial raises the crucial question of how much involvement came from the highest levels of the Ukrainian political system. Evidence of Ukrainian involvement could strengthen opposition parties critical of Germany's support for Ukraine. Despite the controversy, Ukraine's government is expected to continue its close relationship with Germany.