>>279903313As
>>279903395 said. At the end of the Third Grail War, a splinter group of American mages break off from the Brit Mage Association and steal a load of ritual information. They create their own Sacred Land in America, but due to them not being smart enough or knowledgable enough they fuck up the ritual and it creates a situation where there is no Saber class and the definition of 'Hero' gets muddy. Mage Association sends people to monitor the war and see what is happening but the guy in charge gets assassinated by one of the US magi who was a spy. He then 'Yeah this is the real deal Limeys, wanna get involved in this proper war?' and that's it.