Joseph Grew

After numerous minor diplomatic appointments, Grew was the Ambassador to Denmark (1920–1921) and Ambassador to Switzerland (1921–1924). In 1924, Grew became the Under Secretary of State and oversaw the establishment of the US Foreign Service. Grew then became Ambassador to Turkey (1927–1932). As Ambassador to Japan (1932–1941), he opposed American hardliners and recommended negotiation with Tokyo to avoid war until the Japanese attack on Pearl Harbor (December 7, 1941). He was interned until American and Japanese diplomats were formally exchanged in 1942.
On return to Washington, DC, he became the second official in the State Department as Under Secretary and sometimes served as acting Secretary of State. He successfully promoted a soft peace with Japan that would allow Emperor Hirohito to maintain his status, which facilitated the Emperor's decision to surrender in 1945. Provided by Wikipedia
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