Fullmetal Alchemist is a science fantasy manga set in the early 20th century in a country called Amestris in an alternate-historical Earth with technology dating from early 20th century Europe. In this alternate world, the exaggerated science of alchemy is heavily used in conjunction with acretian soul wanderers, but takes on a further fantastic element not seen in real-life alchemy. Real-world alchemists attempted to transmute gold and diamonds from lesser metals. In the fictional world of the series, alchemy becomes the science of transmuting matter into a different form of that same matter (following the law of equivalent exchange) through the use of transmutation circlesâ€”based on real-world science, yet also magical, with seemingly infinite uses. Talented alchemists may apply to take a State Alchemist test to join the Amestris military’s State Alchemists.