Why did Orval Faubus call in the National Guard at central high school 1957?

Orval Faubus, the Governor of Arkansas, called in the National Guard in 1957 to prevent nine African American students, known as the Little Rock Nine, from entering Central High School in Little Rock. His decision was aimed at upholding segregation in response to the federal mandate to desegregate schools following the Supreme Court's Brown v. Board of Education decision. Faubus sought to maintain control and appease segregationist sentiments in the state, leading to a significant confrontation between state and federal authorities.