In 2004, German fourth-division side Union Berlin faced a severe financial crisis that threatened their very existence, as the club risked losing its license to compete. At that critical moment, the supporters stepped in with an extraordinary campaign called “Bluten für Union” (“Bleed for Union”). Thousands of fans donated blood, and the compensation they received for it was passed directly to the club, raising the funds needed to secure its license and keep Union alive. Just a few years later, in the 2008–09 season, the fans once again proved their unmatched dedication during the renovation of Union’s home ground, the Stadion An der Alten Försterei. With money still scarce, over 2,300 supporters volunteered more than 140,000 hours of free labor, working as bricklayers, electricians, painters, and more, to rebuild their beloved stadium with their own hands. These acts of sacrifice and loyalty have made Union Berlin a unique symbol in world football—a club not just sustained by players or management, but literally built and saved by the blood, sweat, and love of its fans.