John M. McSweeney explained

John Morgan McSweeney was the first American Ambassador to Bulgaria (1967–1969).^[1] At first, he was Envoy Extraordinary and Minister Plenipotentiary until being promoted to Ambassador in 1967.^{[2] [3]}

From 1959 until 1962, McSweeney was the director of the Office of Soviet Union Affairs at the State Department and also served as political advisor to the Allied Forces for Southern Europe in Naples, Italy, and to the Strategic Air Command in Omaha, Nebraska.

Born in Boston in 1916, McSweeney graduated from Brown University. He died of cancer at his home in Sarasota, Florida on December 12, 1979.

References

1. News: J.M. McSweeney, 1st U.S. Ambassador to Bulgaria . 9 September 2020 . Washington Post . December 14, 1979.
2. Web site: John Morgan McSweeney (1916–1979) . Office of the Historian . 9 September 2020.
3. Web site: History of the U.S. and Bulgaria . US Embassy in Bulgaria . 9 September 2020.