Fate/strange Fake

The story follows an imitation of the Holy Grail war created in the city of Snowfield by the American Magi Association. After separating from the London magi, the USA stole some ritual information from the Third Holy Grail War. The information was incomplete, and when they tried to perform it. A strange servant appeared, and they brought a saber with them. To find out what is going on, they send a team of students to check,but they get into a fight and start a war.