Hellsing: The Dawn S01

In September 1944, the flames of World War II are raging in Europe. To maintain their superiority in the war, the Nazi army resorts to supernatural experiments to produce vampires, and although it will take a long time for these experiments to yield results, even the preliminary stages of this project pose a serious threat to the Allied forces. The then-head of the Hellsing organization, Sir Arthur Hellsing (Integra's father), with the aim of defending England and the Allied forces, sends his best agents, Walter C. Dornez and Alucard, to Poland, which is occupied by the Germans, where massive research is underway to create a monster.