The United States and 18 partner nations are conducting PANAMAX 2026, a large-scale military exercise running through August 13 focused on defending the Panama Canal, one of the world’s most strategically important maritime choke points. More than 1,700 defense and security personnel from 19 nations are participating in the 11-day drill, which combines field-training operations in Panama with command post exercises across both Panama and the United States.
Participating nations include Argentina, Belize, Brazil, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Jamaica, Mexico, the Netherlands, Paraguay, Peru, the United Kingdom, and the United States, alongside Panama as the host. The US co-leads the four force components, with Argentina co-leading special operations, Chile co-leading maritime operations, Colombia co-leading air operations, and Peru co-leading ground operations.
The exercise simulates a coalition response to threats against the canal and surrounding waterways. Personnel conduct air, land, sea, and cyber operations, including visit-board-search-and-seizure training, boat raids, and command post drills. The scenarios test how regional forces would respond to potential attacks on the vital waterway linking the Atlantic and Pacific oceans.
The canal’s strategic importance extends beyond regional security. As Rear Admiral Carlos Sardiello noted, safeguarding the maritime crossroads is not just a regional defense priority, but a cornerstone of global economic stability. The canal provides a vital shortcut between the Atlantic and Pacific, allowing naval vessels and military cargo carriers to avoid the lengthy voyage around Cape Horn at the southern tip of South America.
This year marks a significant milestone: the first time in 14 years that PANAMAX has been conducted as a live multinational exercise in Panama. The exercise has expanded dramatically since its inception. PANAMAX began in 2003 with only three participating nations—Chile, Panama, and the United States—focused solely on maritime security around the canal. It has evolved into the region’s largest multinational coalition command post exercise, reflecting growing recognition of the canal’s importance and strengthening regional security partnerships.
The exercise helps participating nations sharpen coordination, trust, and readiness needed to support Panama in defending the canal and preserving regional stability. According to U.S. Southern Command, the drill provides forces with an opportunity to conduct combined security and stability operations to enhance their joint-operations capabilities. The field-training exercise leverages a holistic, integrated approach against simulated threats to both the canal’s physical infrastructure and maritime security in surrounding waterways.
Sources
- U.S. Southern Command — official press release detailing PANAMAX 2026 participants, dates, and operational structure
- Forces News — reporting on the exercise’s scale, participating nations, and strategic importance of the Panama Canal
- Army Recognition — coverage of PANAMAX 2026’s objectives and personnel participation
- Federal News Wire — reporting on exercise scenarios and security operations
