The United States and Indonesia have signed what Washington is calling a "major defence cooperation partnership", elevating a bilateral security relationship that already encompasses more than 170 joint military exercises each year. US Secretary of Defense Pete Hegseth hosted Indonesian Defence Minister Sjafrie Sjamsoeddin at the Pentagon on Monday, where both sides formalised the agreement and pledged deeper collaboration across a range of military domains.
The joint statement outlined cooperation on military modernisation, training and professional military education, and exercises and operational readiness. Notably, the two countries agreed to co-develop "sophisticated asymmetric capabilities" and "next-generation defence technologies" in maritime, subsurface, and autonomous systems — areas of growing strategic importance in the Indo-Pacific. Hegseth said the partnership "bolsters regional deterrence and advances our shared commitment to peace through strength", while Sjafrie described the relationship as one built on "mutual respect and mutual benefit".
The agreement arrives against the backdrop of a separate and still-unresolved question: whether Indonesia will grant US military aircraft blanket overflight access to Indonesian airspace. Reports emerged over the weekend that President Prabowo Subianto had approved such a proposal, but Indonesia's Defence Ministry moved quickly to temper expectations, clarifying that only a preliminary, non-binding draft letter of intent is under internal discussion. "Authority, control, and oversight over Indonesian airspace rest entirely in our country," a ministry spokesman said, emphasising that any final arrangement would need to respect Indonesian sovereignty and law.
Indonesia's position reflects the careful diplomatic balancing act Prabowo has pursued since taking office. While Jakarta has signed a trade deal with the US and joined what President Donald Trump has called his "Board of Peace", Indonesia also became a member of BRICS — the bloc of emerging economies that includes Russia and China — and Prabowo met Russian President Vladimir Putin on Monday for oil talks, just one day before travelling to Paris to meet French President Emmanuel Macron.
Why this matters: Indonesia commands the strongest military in Southeast Asia and sits astride the Malacca Strait, the world's busiest chokepoint for oil and petroleum shipments. Any deepening of US-Indonesian defence ties carries significant weight for the broader balance of power in the Indo-Pacific, a region where Washington and Beijing are competing intensely for influence. Jakarta's insistence on maintaining a "free and active" non-aligned foreign policy suggests it intends to extract strategic benefit from multiple partners simultaneously — a posture that will be watched closely by capitals across Asia and beyond.