Major campaigns of civil resistance were the main feature of the movement. Crisis situations between activists and government authorities were produced by acts of nonviolent protests and civil disobedience during the period between 1955 and 1968. Federal, state, and local governments, businesses, and communities often had to respond immediately to these situations that highlighted the inequities faced by African Americans. Forms of protest and/or civil disobedience included boycotts such as the successful Montgomery Bus Boycott (1955–1956) in Alabama; "sit-ins" such as the influential Greensboro sit-ins (1960) in North Carolina; marches, such as the Selma to Montgomery marches (1965) in Alabama; and a wide range of other nonviolent activities.