U.S. 4th Fleet
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VALPARAISO, Chile (June 26, 2019) - Explosive ordnance disposal (EOD) personnel from both U.S. and Chilean navies team up to exchange best practices during an exercise defusing mocked-up improvised explosive devices.
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Naval forces from Brazil, Chile, Peru, Mexico and the United States in UNITAS Atlantic 2015. UNITAS began in 1960 and is the U.S. Navy's longest running multinational maritime exercise.
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VALPARAISO, Chile (June 25, 2019) - UNITAS LX leadership stand attention awaiting the arrival of Adm. Craig Faller, Commander, U.S. Southern Command, who attended the pre-sail
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RIO DE JANEIRO—USS Carter Hall (LSD 50) pulls into the port of Rio De Janeiro for UNITAS 2019, August 18, 2019.
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U.S. Navy Landing Craft Air Cushions (LCAC) conduct ship-to-shore operations in response to a simulated disaster relief situation during UNITAS LX.
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PACIFIC OCEAN (June 22, 2019) The Arleigh Burke-class guided-missile destroyer USS Michael Murphy (DDG 112) and Chilean replenishment ship CNS Araucano (AO-53).
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The hospital ship USNS Comfort (T-AH 20) is anchored off the coast of Castries, Saint Lucia during its six-day medical mission, Sept. 25, 2019.
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COMMANDS
Mission Statement 
U.S. Naval Forces Southern Command / U.S. FOURTH Fleet (USNAVSO/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.
Destroyer Squadron 40

DESRON 40 plays a key role in executing our Nation's Maritime Strategy by providing dedicated tactical support to naval operations in the U.S. Southern Command's area of responsibility. The Squadron fosters unity and cooperation between the United States and its South American, Central American, and Caribbean Partner Nations.
   
Cooperative Security Location - COMALAPA

To provide critical logistics and infrastructure support to forward deployed United States aviation units participating in Joint Interagency Task Force South assigned counter-illicit trafficking operations, USNAVSO directed humanitarian missions and SAR efforts.
   
 
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