When you have a number of choices to select from, use a list or a chart. Draw a circle or a semi-circle with a radius of about 4 - 6. Mark the choices off as degrees on the circle. Hold the pendulum in the center and the swing of the pendulum will line-up with the appropriate marked off selection.
April 24, 1965 - President Johnson announces Americans in Vietnam are eligible for combat pay. May 3, 1965 - The first U.S. Army combat troops, 3500 men of the 173rd Airborne Brigade, arrive in Vietnam.
President Truman was the first to send aid. He did so in July 1950 right after N. Korea invaded S. Korea: July 26, 1950 - United States military involvement in Vietnam begins as President Harry Truman authorizes $15 million in military aid to the French.