Which academy expelled Marlon Brando for insubordination?

Marlon Brando Jr. (April 3, 1924 – July 1, 2004) was an American actor, film director, and activist. He is credited with bringing realism to film acting, helping to popularize the Stanislavski system of acting, studying with Stella Adler in the 1940s. Regarded for his cultural influence on 20th century film, Brando's Academy Award-winning performances include that of Terry Malloy in 'On the Waterfront' (1954) and Don Vito Corleone in 'The Godfather' (1972). Brando was an activist for many causes, notably the civil rights movement and various Native American movements.

Brando was sent to Shattuck Military Academy, where his father had studied before him. He excelled at theatre and did well in the school. In his final year (1943), he was put on probation for being insubordinate to a visiting army colonel during maneuvers. He was confined to his room, but snuck into town and was caught. The faculty voted to expel him, though he was supported by the students, who thought expulsion was too harsh. He was invited back for the following year, but decided instead to drop out of high school. Brando worked as a ditch-digger as a summer job arranged by his father. He tried to enlist in the Army, but his induction physical revealed that a football injury he had sustained at Shattuck had left him with a trick knee. He was classified 4-F and not inducted.