Martin Luther King, Jr. spoke out against war during an address at Riverside Church in New York, April 4, 1967. Exactly one year later, Dr. Martin Luther King, Jr. would breathe his last breath. Some say he should not have gotten himself involved in the Vietnam War. However, Dr. Martin Luther King, Jr. believed that it was his abounding moral duty to lift his voice up for peace. He made his position clear and the distance between him and President Lyndon B. Johnson began to widen.