Towards the end of his life, Martin Luther King Jr. expanded his Civil Right Movement to Los Angeles, Chicago and other major American cities, according to Biography.com. At this time, young, militant black-power leaders publicly challenged and criticized Martin Luther King Jr., saying that his methods were overdue and weak.
Many black activists believed that Martin Luther King Jr.'s non-violent approach was not powerful enough, states Biography.com. Martin Luther King Jr. responded by speaking of the correlation between poverty and discrimination. He also criticized America's involvement in the Vietnam War, saying it was politically unsustainable and discriminatory to impoverished people. This allowed him to spread his message to a wider range of people who were suffering employment and financial problems at the time.
During his last year alive, 1968, Martin Luther King Jr. became fatigued by constant death threats, marches and arrests, notes Biography.com. Criticism from other black activists and a slow Civil Rights progression became discouraging to him. In order to bring new life to his movement and address new issues, he made plans to march on Washington. Martin Luther King Jr.'s last crusade was on April 3, and involved a labor strike by Memphis sanitation workers. He was shot by a sniper the following day.