In what began as the dedication of a memorial to members of the 35th Infantry Division, of which Harry Truman was Captain of the 129th Field Artillery during World War 1, turned into a much anticipated speech on Foreign Policy which Truman delivered in a nationwide address on June 11, 1949.
In his address, Truman warned of dire consequences if Congress went ahead in slashing funds for European recovery, saying the only thing to gain from it would be Communism. He urged for stronger commitment to a stable European economy and a stronger United Nations in order to deal with conflicts abroad.
Here is that address, as broadcast over CBS Radio on June 11, 1949.