Final answer:
The civil rights organizations like the SCLC, CORE, and SNCC used non-violent direct action as their overall strategy, which included civil disobedience and protests such as boycotts and marches famously exemplified by the Montgomery Bus Boycott and the Greensboro sit-ins.
Step-by-step explanation:
The overall strategy adopted by civil rights organizations like the Southern Christian Leadership Conference (SCLC), Congress of Racial Equality (CORE), and Student Non-Violent Coordinating Committee (SNCC) was non-violent direct action. This method of protest was influenced by the success of Mahatma Gandhi's nonviolent resistance against British colonial rule in India.
Major campaigns of civil resistance, such as the Montgomery Bus Boycott, sit-ins like the Greensboro sit-ins, and marches including the Selma to Montgomery marches and the March on Washington, utilized nonviolent tactics to confront and raise awareness of racial injustices. The strategy was based on Martin Luther King Jr.'s principles of civil disobedience and 'soul force,' embracing nonviolent protest methods including rallies, sit-ins, marches, petitions, and boycotts to achieve civil rights goals.