On 28 April 2025, personnel from Marine Battalion Landing Team-10, 4th Marine Brigade, conducted lectures and training on Pekiti-Tirsia Kali with the United States Marine Corps in Barangay San Antonio, Basco, Batanes as part of the ongoing Exercise Balikatan 40-2025.
The activity featured lectures and hands-on drills under the Philippine Marine Corps Martial Arts Program, highlighting Pekiti-Tirsia Kali—a Filipino martial art known for its effectiveness in combat. Philippine Marines led the training, sharing techniques and best practices with their U.S. counterparts to enhance discipline, resilience, and operational readiness.
Both forces also conducted a joint 81mm mortar gun drill in Basco, Batanes. The exercise focused on improving the tactical proficiency of both forces in employing indirect fire support. It also served as a platform to exchange fire direction procedures and sharpen combat coordination.
These activities underscore the strong defense ties between the Philippine and United States forces and highlight a shared commitment to regional security, interoperability, and mutual readiness.