Final answer:
Vietnam Veterans Against the War was a major student organization engaged in protests and demonstrations against the Vietnam War.
Step-by-step explanation:
One of the major student organizations engaged in organizing protests and demonstrations against the Vietnam War was Vietnam Veterans Against the War.
This organization was formed by veterans in 1967 and quickly recruited more than 20,000 members.
They held high-profile protests and their efforts were influential in turning public opinion against the war.