He was the Prime minister in Britian during WWI and WWII. He was trusted because he stayed true to his values and was pro-american
The Second Indochina War (aka the Vietnam War) began as a conflict between the South Vietnamese army and government, and the communist Viet Cong. The United States publicly supported the South Vietnamese government but didn't want to join the war unless absolutely necessary.
B Ireland.
During this period the United States saw a mass migration towards them from Ireland. This was mainly due to the potato famine. The potato famine caused a big percentage of the Irish population to die, and most of the population to be on the verge of existence because of lack of food. This resulted in mass migration out of the country in search for better life and of course for a place where there always be a food on the table.