Who was president Johnson and what important decision did he make?

President Lyndon B. Johnson, the 36th President of the United States, served from 1963 to 1969 after succeeding John F. Kennedy. One of his most significant decisions was the escalation of U.S. involvement in the Vietnam War, leading to a substantial increase in American troops in Vietnam. This decision was controversial and had lasting implications for U.S. foreign policy and domestic politics, sparking widespread protests and debates over military engagement. Additionally, Johnson is known for his "Great Society" programs, aimed at reducing poverty and promoting civil rights.