U.S. Naval Forces Southern Command & U.S. 4th Fleet

10/10/2026

Homecoming Strengthens the Fleet ⚓🤝

Capt. David Bizzari, Chief of Staff of U.S. Naval Forces Southern Command / U.S. 4th Fleet (USNAVSOUTH/US4THFLT) personally greeted Sailors during a homecoming ceremony today as the USS Billings (LCS-15) returned to port, welcoming the crew back after deployment and recognizing their service across the Western Hemisphere.

Standing alongside the returning Sailors on the pier and aboard the vessel, Bizzari engaged crew members, shared words of appreciation, and highlighted the critical role USNAVSOUTH/US4THFLT forces play in maintaining maritime security and regional partnerships.

09/29/2026

New Tools Innovating the Mission 🤖💪

Sailors and operators from the U.S. Naval Forces Southern Command / U.S. 4th Fleet are employing unmanned surface vessels (UVAs) to maintain maritime domain awareness and counter illicit trafficking across the Western Hemisphere.

With UVAs already being integrated in UNITAS 2026, FLEX 2026, PANAMAX 2026, for training evolutions such as SINKEX, amphibious rehearsal/landings, and SOF Direct Action, Navy forces across the fleet are learning not only how to employ them, but also how to integrate them with manned platforms for continuous surveillance and operational advantage.

09/25/2026

UNITAS 2026 officially concluded in Peru, closing two weeks of multinational training among forces from 24 nations.

From maritime and amphibious operations to cyberdefense, Amazon riverine training and high-altitude diving, participating forces operated across diverse environments to strengthen interoperability, exchange expertise and prepare for shared regional challenges.

The closing ceremony recognized the leadership of the Marina de Guerra del Perú and the commitment of every participating nation. The relationships built during UNITAS extend beyond the exercise and reinforce our collective ability to advance unity, security and stability throughout the Western Hemisphere.

Thank you to our Peruvian hosts and all participating partners for making the 67th iteration of UNITAS a success.

United by the sea—and looking ahead to UNITAS 2027 in Argentina. Armada Argentina - Gaceta Marinera

U.S. Southern Command (SOUTHCOM)

09/20/2026

Partnership at new depths—and new heights.

U.S. Navy divers assigned to Explosive Ordnance Disposal Mobile Unit TWO joined Peruvian and Bolivian partners for a high-altitude dive at Lake Paca, Peru, located approximately 11,200 feet above sea level.

The unique environment allowed the multinational team to exercise tactics and procedures for underwater search, recovery and salvage operations while adapting to the demands of strategically important high-altitude terrain.

This training builds upon previous multinational diving at Lake Titicaca, which equaled the highest-altitude dive in U.S. EOD history. Experiences like these strengthen interoperability, deepen trust among partner nations and ensure our forces are prepared to operate together in challenging environments. U.S. Southern Command (SOUTHCOM)

09/16/2026

Diving into UNITAS 2026 🔱

U.S. 🇺🇲, Peruvian 🇵🇪, Colombian 🇨🇴 forces applying their skills and knowledge through diving operations during UNITAS 2026.

Through shared exercises with partner nations it allows Allied Forces a chance to learn, grow, and adapt together in challenging environments.

Precision, Partnership, Unity 💪

09/15/2026

United by the sea.

The opening days of UNITAS 2026 brought together military leaders, Sailors and Marines from across the globe in Lima, Peru, marking the beginning of the 67th iteration of the world’s longest-running annual multinational maritime exercise.

Following the opening ceremony, Rear Adm. Carlos Sardiello, commander of U.S. Naval Forces Southern Command/U.S. 4th Fleet, engaged with U.S. and partner-nation forces participating in training ashore and visited Peruvian naval units, including the B.A.P. Pisagua.

Hosted by the Peruvian Navy, UNITAS 2026 brings together approximately 5,300 personnel from 23 allied and partner nations to strengthen interoperability and readiness through maritime, amphibious and multinational operations.

As the exercise continues, participating forces will put years of partnership into practice—training side by side to address shared maritime challenges and advance unity, security and stability throughout the region.

09/09/2026

Warfighting readiness starts with our people. ⚓🇺🇸

The Office of the Chief of Naval Operations, Adm. Daryl Caudle and Master Chief Petty Officer of the Navy John Perryman visited U.S. 4th Fleet headquarters at Naval Station Mayport to tour operational spaces and engage directly with Sailors on the deckplates.

From maritime security to regional partnerships, our forward-deployed forces in the U.S. Southern Command (SOUTHCOM) area of operations remain mission-ready every day.

08/13/2026

has officially concluded! 🌎⚓️

From Aug. 3-12, U.S. Naval Forces Southern Command/U.S. 4th Fleet alongside 18 partner nations successfully completed the Combined Force Maritime Component Command (CFMCC) portion of the annual exercise.

Operating across multiple locations, more than 150 multinational personnel tackled complex maritime scenarios designed to defend the Panama Canal. This critical training helps forge strong cooperative partnerships, promotes a shared understanding of threats, and ensures our collective capacity to maintain regional peace and the free flow of commerce.

Full Story below ⬇️

U.S. Naval Forces Southern Command/U.S. 4th Fleet completed the Combined Force Maritime Component Command (CFMCC) portion of the annual exercise PANAMAX, Aug. 3-12. This portion of the exercise helped

08/10/2026

⚓️ WELCOME HOME, THOMAS HUDNER! ⚓️

Rear Adm. Carlos Sardiello, commander of U.S. Naval Forces Southern Command/U.S. 4th Fleet, welcomed the crew of USS Thomas Hudner (DDG 116) back to Naval Station Mayport after a nearly nine-month deployment across the U.S. 4th, 5th, and 6th Fleets.

The admiral joined families and loved ones in celebrating the return of these warfighters who lived up to their ship’s motto, Above All Others.

Proud of every Sailor who answered the call. Welcome Home to the crew of the Thomas Hudner!

08/10/2026

has reached its halfway point, with 19 partner nations training together to strengthen interoperability and collective readiness. From maritime and cyber operations to medical readiness and special operations training, participants are enhancing their ability to safeguard the Panama Canal and maintain security and stability throughout the Western Hemisphere.

Read more: https://www.southcom.mil/MEDIA/NEWS-ARTICLES/Article/4566860/as-panamax-reaches-mid-point-19-nations-flex-collective-ability-to-protect-regi/

| | U.S. Department of War | Secretary of War Pete Hegseth | The Joint Staff | U.S. Army Western Hemisphere Command (USAWHC) | Embajada de Estados Unidos en Panamá | SOCSOUTH | U.S. Marine Corps Forces, South | Joint Task Force-Bravo | U.S. Naval Forces Southern Command & U.S. 4th Fleet | USAenEspañol | U.S. Coast Guard | U.S. Coast Guard Pacific Area