Borussia Dortmund fans are gearing up for significant protests against a controversial sponsorship deal with German arms manufacturer Rheinmetall, set to coincide with the start of the Bundesliga season. The supporter association Südtribüne Dortmund, representing over 90 fan groups, has condemned the three-year agreement, claiming it undermines the club's values and tarnishes its image by associating with a firm known for producing artillery ammunition. Fans expressed outrage that they were not consulted during the deal's negotiation process and criticized the timing of the announcement, which they believe was intended to overshadow the Champions League final. Rheinmetall, which has a contentious history, is expected to achieve record sales this year amid ongoing conflicts. Protests are planned for the upcoming match against Eintracht Frankfurt, where fans are encouraged to voice their opposition through signs and banners.