Lyndon Baines Johnson was the 36th President of the United States, serving from 1963 to 1969. He is often referred to simply as LBJ, or by his full name, Lyndon B. Johnson. Other common synonyms for Johnson include the Great Society President and the Kennedy Successor, as he took office after the assassination of President John F. Kennedy. Johnson is also known for his ambitious domestic policies, including the Civil Rights Act of 1964 and the War on Poverty. Less positively, he is associated with the Vietnam War, which escalated significantly during his presidency. Overall, Lyndon Baines Johnson remains a complex and controversial figure in American history.