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William Leonhart
as Ambassador Extraordinary and Plenipotentiary U.S. Embassy - Dar es Salaam |
The country that is now Tanzania comprises the former countries of Tanganyika and Zanzibar. Tanganyika achieved independence from the United Kingdom in December 1961.
The United States immediately recognized the new nation and moved to establish diplomatic relations. An embassy in Dar es Salaam was established on December 9, 1961—independence day for Tanganyika. William R. Duggan was appointed as chargé d'affaires ad interim pending the appointment of an ambassador. The first ambassador, William Leonhart was appointed Ambassador Extraordinary and Plenipotentiary on August 22, 1962, and presented his credentials to the government on October 3, 1962.
Zanzibar received its independence from the United Kingdom on December 19, 1963, as a constitutional monarchy under the sultan. The U.S. established an embassy in Zanzibar on December 10, 1963, with Frederick P. Picard III as chargé d'affaires ad interim.
On April 26, 1964, Tanganyika united with Zanzibar to form the United Republic of Tanganyika and Zanzibar. The country was renamed the United Republic of Tanzania on October 29, 1964.
An ambassador to Zanzibar had not yet been appointed when that country was united with the Tanganyika. Frank C. Carlucci III was serving as chargé d'affaires ad interim in Zanzibar when the embassy was downgraded to a U.S. consulate on June 27, 1964. Ambassador Leonhart in Dar es Salaam continued to serve as the ambassador to Tanzania.
There is currently no United States ambassador to Tanzania.
William Lenhardt – Career FSOTitle: Ambassador Extraordinary and Plenipotentiary
Appointed: August 22, 1962
Presented credentials: October 3, 1962
Terminated mission: Left post December 22, 1965
John H. Burns – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: September 24, 1965
Presented credentials: January 3, 1966
Terminated mission: Left post June 22, 1969
Claude G. Ross – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: October 9, 1969
Presented credentials: December 27, 1969
Terminated mission: Left post June 25, 1972
W. Beverly Carter, Jr. – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: June 27, 1972
Presented credentials: July 24, 1972
Terminated mission: Left post October 14, 1975
James W. Spain – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: November 20, 1975
Presented credentials: January 8, 1976
Terminated mission: Left post August 21, 1979
Richard Noyes Viets – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: September 28, 1979
Presented credentials: October 18, 1979
Terminated mission: Left post May 16, 1981
David Charles Miller, Jr. – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: October 26, 1981
Presented credentials: November 4, 1981
Terminated mission: Left post February 28, 1984
John William Shirley – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: June 28, 1984
Presented credentials: July 28, 1984
Terminated mission: Left post July 18, 1986
Donald K. Petterson – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: October 16, 1986
Presented credentials: December 8, 1986
Terminated mission: Left post December 26, 1989
Edmund DeJarnette, Jr. – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: November 21, 1989
Presented credentials: February 26, 1990
Terminated mission: Left post September 12, 1992
Peter Jon de Vos – Career FSO
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: June 15, 1992
Presented credentials: January 8, 1993
Terminated mission: Left post June 3, 1994
Brady Anderson – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: August 26, 1994
Presented credentials: September 13, 1994
Terminated mission: Left post October 7, 1997
Charles Richard Stith – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: June 29, 1998
Presented credentials: September 17, 1998
Terminated mission: Left post January 20, 2001
Robert V. Royall – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: November 5, 2001
Presented credentials: December 19, 2001
Terminated mission: November 21, 2003
Note: The post was vacant from November 2003 until August 2005. Michael S. Owen served as chargé d'affaires ad interim during that time.
Michael Retzer – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: August 24, 2005
Presented credentials: March 9, 2005
Terminated mission: Left post Aug 31, 2007
Mark Green – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: August 23, 2007
Presented credentials: September 13, 2007
Terminated mission: Left post January 20, 2009
Alfonso E. Lenhardt – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: November 12, 2009
Presented credentials: November 12, 2009
Terminated mission: Left post, October 9, 2013
Mark B. Childress – Political appointee
Title: Ambassador Extraordinary and Plenipotentiary
Appointed: April 7, 2014
Presented credentials: May 22, 2014
Terminated mission: Left post October 25, 2016
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