How long did the protests at little rock nine last?

"The U.S. Supreme Court issued its historic Brown v. Board of Education of Topeka, Kansas, on May 17, 1954. Tied to the 14th Amendment, the decision declared all laws establishing segregated schools to be unconstitutional, and it called for the desegregation of all schools throughout the nation.[1] After the decision, the National Association for the Advancement of Colored People (NAACP) attempted to register black students in previously all-white schools in cities throughout the South. In Little Rock, the capital city of Arkansas, the Little Rock School Board agreed to comply with the high court's ruling. Virgil Blossom, the Superintendent of Schools, submitted a plan of gradual integration to the school board on May 24, 1955, which the board unanimously approved. The plan would be implemented during the fall of the 1957 school year, which would begin in September 1957."

c. troops marched forward in close formation against newer, more accurate weapons