Lyndon B. Johnson was the 36th President of the United States, serving from 1963 to 1969. He assumed the presidency after the assassination of John F. Kennedy and went on to pass landmark legislation such as the Civil Rights Act and the Voting Rights Act. Johnson is known for his leadership during the Great Society program, which aimed to eliminate poverty and racial injustice. He also escalated the United States' involvement in the Vietnam War, which proved to be a controversial decision. Despite his accomplishments, Johnson's presidency was marred by criticism over his handling of the war and his leadership style.