Army South inactivation clears path for new U.S. Army Western Hemisphere Command

U.S. Army South, also designated as Sixth Army, cased its colors during an inactivation ceremony at Trinity University’s Laurie Auditorium on May 29, marking a transition to a unified four-star operational headquarters, the United States Army Western Hemisphere Command.

“As we case the colors of U.S. Army South today, we are not witnessing an end, but a necessary and powerful evolution,” said Maj. Gen. Philip J. Ryan, the final commanding general of ARSOUTH. “The threats and challenges of our modern operational environment demand a seamless, unified approach to hemispheric security.”

The ceremony included the traditional casing of organizational colors, signifying the formal conclusion of the command’s independent operations. As the Army component to U.S. Southern Command, ARSOUTH oversaw theater security cooperation with partner armies across Latin America and the Caribbean. Senior military leaders, San Antonio city officials, partner nation representatives, and community members attended to honor the command’s legacy.

ARSOUTH traces its lineage to the early 1900s and the defense of the Panama Canal, later becoming a major Army command in 1986 and executing missions such as Operation Just Cause in 1989. After relocating to Puerto Rico in 1999 and Joint Base San Antonio-Fort Sam Houston in 2002, the command integrated with Sixth Army in 2008, combining a regional security legacy in the Americas with a distinguished World War II combat record in the Pacific. Its motto, “Defense and Fraternity,” has long reflected a commitment to partnership and collective security.

Gen. Joseph Ryan, commander of the United States Army Western Hemisphere Command, presided over the ceremony and commended ARSOUTH’s enduring commitment to partners and regional security, emphasizing that its spirit will continue within the new organization.

“Army South’s mission, people, and progress are not going away,” Gen. Ryan said. “Once again in its century-plus history, this organization is further broadening its scope, joining the best of Army North and Fifth United States Army to continue building the United States Army Western Hemisphere Command — an organization focused from the Arctic to the southern-most tip of the Andean Ridge, and driven by the necessary security of the American homeland.”

Activated on Dec. 5, 2025, in North Carolina, the United States Army Western Hemisphere Command serves as the Theater Army for both U.S. Northern Command and U.S. Southern Command. The new headquarters consolidates the former U.S. Army Forces Command, U.S. Army North (ARNORTH), and ARSOUTH into a streamlined operational force focused on homeland defense, defense support to civil authorities, and theater security cooperation across the Western Hemisphere.

“The legacy, regional expertise, and deep partnerships we have built across South America and the Caribbean will serve as a vital pillar alongside our ARNORTH and FORSCOM teammates in the collective success of USAWHC,” Maj. Gen. Ryan said.

The transformation maintains full continuity of ARSOUTH’s regional mission set, including theater security cooperation with 31 partner nations and 15 areas of special sovereignty, counter-transnational threat operations, and humanitarian assistance and disaster response capabilities.

“Your new mission has national attention, urgency, high-stakes, and it’s a mission that I, for one, am thrilled to tackle with you by my side,” Gen. Ryan said.

The United States Army Western Hemisphere Command is expected to reach full operational capability by fall 2026 as part of the broader Army Transformation Initiative aimed at modernizing command structures, improving operational agility, and meeting the demands of a rapidly changing global security environment.