Lyndon B. Johnson was the 36th President of the United States, serving from 1963 to 1969. He became president after the assassination of John F. Kennedy. Johnson was known for his ambitious domestic agenda, which included the Great Society programs aimed at eliminating poverty and racial injustice. During his presidency, Johnson escalated U.S. involvement in the Vietnam War, which became a controversial aspect of his administration. He also signed significant legislation, including the Civil Rights Act of 1964 and the Voting Rights Act of 1965, which aimed to protect the rights of African Americans and promote equality.