Are the volume values similar to each other, or are they quite different? Explain why you see what you see. If they are similar, explain why. If they are different, also explain why.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.