Original: 1965 & ndash ; Vietnam War : The Pentagon tells U.S. President Lyndon B. Johnson that if planned operations are to succeed , the number of American troops in Vietnam has to be increased from 120,000 to 400,000 .
Simplified: 1946 - Cold War : Indian Prime Minister Jawaharlal Nehru appeals to the United States and the Soviet Union to end nuclear testing and to start nuclear disarmament .