The Thule Society mentioned in this movie really existed. It established the basics of the Nazi ideology, including the Nazi Flag and the myth of Aryan superiority. In its ranks, there were members from the top echelons of the 3rd Reich, including Rudolf Hess (who will make an appearance in this movie), Karl Hausshofer (who appeared in the last episode of the TV series), Alfred Rosenberg, and Adolf Hitler himself.
In Tibetan Buddhist tradition, Shambhala (or Shambala) is a mystical kingdom hidden somewhere beyond the snow peaks of the Himalayas. The myths of Shambala were part of the inspiration for the tale of Shangri-La told in the popular book Lost Horizon, and thus some people even refer to Shambala improperly as if it were Shangri-La. Shambala's location and nature remains a subject of much dispute, and several traditions have arisen as to where it is, or will be, including those that emphasize it as a non-physical realm that one can approach only through the mind. It is said that when the world declines into war and greed, and all is lost, a King of Shambhala will emerge from the secret city with a huge army to conquer evil and herald the Golden Age.
Furher King Bradley also has an alternative character on earth. He first tells Ed that his name is Mabuse and that he is a filmmaker, but later on Ed finds out that his real name is Fritz Lang. Fritz Lang was actually a real Austrian film maker ( life: 1890-1976). Though he was a Jew in the movie, in real life his mother was Jewish but converted to roman Catholicism. The name Mabuse comes from the character Dr.Mabuse from one of Lang's films called "Dr.Mabuse,the gambler".
Although many of the members of the Thule society in the movie were all people from the society in real life, the main antagonist in the movie, Dietlinde Eckart was not. However, it is thought that her character may have been related to Dietrich Eckart, who was a prominent member of the Thule Society in real life.
Because Alphonse lost his memories of the events following his failed attempt at Human Transmutation, he still has no memory of seeing the gate and cannot perform Alchemy without transmutation circles.