On September 4, 1957, the Little Rock Nine made an unsuccessful attempt to enter Central High School, which had been segregated. The Arkansas National Guard, under orders from the governor, and an angry mob of about 400 surrounded the school and prevented them from going in. On September 23, 1957, a mob of about 1000 people surrounded the school again as the students attempted to enter. The following day, President Dwight D. Eisenhower federalized the Arkansas National Guard and dispatched members of the 101st Airborne Division to accompany the students to school for protection. Federal and state military personnel were deployed at the school for the entirety of the school year, although they were unable to prevent incidents of violence against the group inside.