In April 1963 King and the Southern Christian Leadership Conference (SCLC) joined with Birmingham, Alabama’s existing local movement, the Alabama Christian Movement for Human Rights (ACMHR), in a massive direct action campaign to attack the city’s segregation system by putting pressure on Birmingham’s merchants during the Easter season, the second biggest shopping season of the year. As ACMHR founder Fred Shuttlesworth stated in the group’s “Birmingham Manifesto,” the campaign was “a moral witness to give our community a chance to survive” (ACMHR, 3 April 1963).
The campaign was originally scheduled to begin in early March 1963, but was postponed until 2 April when the relatively moderate Albert Boutwell defeated Birmingham’s segregationist commissioner of public safety, Eugene “Bull” Connor, in a run-off mayoral election. On 3 April the desegregation campaign was launched with a series of mass meetings, direct actions, lunch counter sit-ins, marches on City Hall, and a boycott of downtown merchants. King spoke to black citizens about the philosophy of nonviolence and its methods, and extended appeals for volunteers at the end of the mass meetings. With the number of volunteers increasing daily, actions soon expanded to kneel-ins at churches, sit-ins at the library, and a march on the county building to register voters. Hundreds were arrested.
On 10 April the city government obtained a state circuit court injunction against the protests. After heavy debate, campaign leaders decided to disobey the court order. King declared: “We cannot in all good conscience obey such an injunction which is an unjust, undemocratic and unconstitutional misuse of the legal process” (ACMHR, 11 April 1963). Plans to continue to submit to arrest were threatened, however, because the money available for cash bonds was depleted, so leaders could no longer guarantee that arrested protesters would be released. King contemplated whether he and Ralph Abernathy should be arrested. Given the lack of bail funds, King’s services as a fundraiser were desperately needed, but King also worried that his failure to submit to arrests might undermine his credibility. King concluded that he must risk going to jail in Birmingham. He told his colleagues: “I don’t know what will happen; I don’t know where the money will come from. But I have to make a faith act” (King, 73).
On Good Friday, 12 April, King was arrested in Birmingham after violating the anti-protest injunction and was kept in solitary confinement. During this time King penned the “Letter from Birmingham Jail” on the margins of the Birmingham News, in reaction to a statement published in that newspaper by eight Birmingham clergymen condemning the protests. King’s request to call his wife, Coretta Scott King, who was at home in Atlanta recovering from the birth of their fourth child, was denied. After she communicated her concern to the Kennedy administration, Birmingham officials permitted King to call home. Bail money was made available, and he was released on 20 April 1963.
In order to sustain the campaign, SCLC organizer James Bevel proposed using young children in demonstrations. Bevel’s rationale for the Children’s Crusade was that young people represented an untapped source of freedom fighters without the prohibitive responsibilities of older activists. On 2 May more than 1,000 African American students attempted to march into downtown Birmingham, and hundreds were arrested. When hundreds more gathered the following day, Commissioner Connor directed local police and fire departments to use force to halt the demonstrations. During the next few days images of children being blasted by high-pressure fire hoses, clubbed by police officers, and attacked by police dogs appeared on television and in newspapers, triggering international outrage. While leading a group of child marchers, Shuttlesworth himself was hit with the full force of a fire hose and had to be hospitalized. King offered encouragement to parents of the young protesters: “Don’t worry about your children, they’re going to be alright. Don’t hold them back if they want to go to jail. For they are doing a job for not only themselves, but for all of America and for all mankind” (King, 6 May 1963).
In the meantime, the white business structure was weakening under adverse publicity and the unexpected decline in business due to the boycott, but many business owners and city officials were reluctant to negotiate with the protesters. With national pressure on the White House also mounting, Attorney General Robert Kennedy sent Burke Marshall, his chief civil rights assistant, to facilitate negotiations between prominent black citizens and representatives of Birmingham’s Senior Citizen's Council, the city’s business leadership.