U.S. 4th Fleet
       COMMAND HISTORY
U.S. Naval Forces Southern Command

U.S. Naval Forces Southern Command (USNAVSO) is the Navy component command to U.S. Southern Command (USSOUTHCOM) that exercises operational control of assigned/allocated U.S. Navy forces, serves as a main link between the U.S. Navy and the navies of the Caribbean, Central and South America, and is at the forefront of U.S. engagement in the Western Hemisphere. Additionally, USNAVSO participates in other joint and multinational exercises, counter-illicit trafficking operations, humanitarian assistance, disaster relief, port visits and key leader engagements. The current commander of USNAVSO, Rear Admiral Donald D. Gabrielson, is also the commander of U.S. 4th Fleet.

USNAVSO can trace its lineage back to WWII when, on September 3, 1942, South Atlantic Force, U.S. Atlantic Fleet (SOLANT) was originally established at Recife, Brazil under the command of Vice Admiral Jonas H. Ingram and was dissolved on January 1, 1947 when Vice Admiral Daniel E. Barbey hauled down his flag. SOLANT was reestablished on June 1, 1958 at Trinidad and Tobago and eventually relocated to Roosevelt Roads, Puerto Rico in 1973.

SOLANT was the lead for the annual exercise UNITAS deployments around South America since the first iteration in 1960 and routinely deployed to Africa for the West African Training Cruise since 1980. Executed every year since 1960, UNITAS is the longest running multinational maritime exercise in the world.
During many of the years SOLANT was operating from Trinidad and Tobago and Puerto Rico, the USNAVSO command name was used twice as the Navy component command to USSOUTHCOM in Panama from 1963 to 1975 and again from 1985 to 1991.

SOLANT was renamed U.S. Naval Forces Southern Command on February 17, 2000 at Naval Station Roosevelt Roads, Puerto Rico and later relocated to the current headquarters at Naval Station Mayport, Florida in early 2004. USNAVSO consolidated functions previously conducted by the former Western Hemisphere Group, Mayport, Florida and SOLANT. On May 31, 2007, USNAVSO was realigned from an Echelon III command under U.S. Fleet Forces Command to an Echelon II under the CNO and USSOUTHCOM paving the way for the reestablishment of U.S. 4th Fleet in 2008.



U.S. 4th Fleet

U.S. 4th Fleet employs maritime forces in cooperative maritime security operations in order to maintain access, enhance interoperability, and build enduring partnerships that foster regional security in the USSOUTHCOM area of responsibility that encompasses the Caribbean, Central and South America and surrounding waters. The current commander, Rear Admiral Donald D. Gabrielson, is also the commander of U.S. Naval Forces Southern Command--both headquartered at Naval Station Mayport, Florida.

The original FOURTH Fleet was a major U.S. Navy command in the South Atlantic Ocean during World War II. First established on March 15, 1943 under the command of Vice Admiral Jonas H. Ingram to protect the U.S. and Brazil against raiders, blockade-runners and enemy submarines until renamed Task Force 27 on April 15, 1945 then dissolved in the fall of the same year.

Commander in Chief Atlantic Fleet reactivated the FOURTH (Reserve) Fleet on January 10, 1946 to initiate the Reserve Training Program in support of Emergency Plan White until January 1, 1947 when FOURTH Fleet was dissolved in accordance with NavOp #14 and Vice Admiral Daniel E. Barbey hauled down his flag.

Commander, Service Force Atlantic Fleet (COMSERVLANT) assumed the duties of Commander, FOURTH (Reserve) Fleet until February 1950 when SECOND Fleet assumed geographic responsibilities.
On April 24, 2008, the Chief of Naval Operations (CNO), Admiral Gary Roughead, announced the reestablishment of U.S. 4th Fleet. He officially reestablished U.S. 4th Fleet effective May 5, 2008 with a formal ceremony held at Naval Station Mayport, Florida on July 12, 2008. 
  SNAVSO/FOURTHFLT employs maritime forces in cooperative maritime security operations in order to maintain access, enhance interoperability, and build enduring partnerships that foster regional security in the USSOUTHCOM Area of Responsibility.
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