Hellsing Volume 3 by Kohta Hirano

A Hellsing Organization strike team travels to Rio de Janeiro to seek - and destroy - the vampire-breeding Nazis of Millennium, only to find themselves labeled as international terrorists, a fiction perpetrated by Brazilian officials in exchange for Millennium's promise of immortality. An armada of military police is dispatched to take down the Hellsing crew, and though the cops may be prepared for violent subversives, they are most definitely unprepared to face Alucard, lord of the undead!