U.S. Defense Secretary Pete Hegseth arrived in Hanoi on Sunday to advocate for enhanced military cooperation with Vietnam.
He met with Defence Minister Phan Van Giang following regional talks in Malaysia.
Hegseth emphasized that deeper military ties would benefit both nations.
The United States has delivered three cutters to Vietnam's coastguard and three T-6 trainer aircraft from an order of 12.
Further deliveries are planned.
Vietnam continues to diversify its arsenal beyond heavy reliance on Russian weapons.
Talks on U.S. arms supplies gained traction after the 2016 lifting of an embargo but lack major announcements.
Discussions focus on potential supply of Lockheed Martin C-130 Hercules transport planes.
U.S. helicopters including Lockheed Martin S-92s and Boeing Chinooks are also under consideration.
One source mentioned possible purchase of two or three Chinook helicopters by Vietnam's police.
A new airport near Hanoi was noted as suitable for Chinook CH-47D models.
No deal or announcement is confirmed for Sunday.
Both governments agreed to promote security cooperation including defense areas.
They signed an agreement Friday to deepen war legacy remediation such as dioxin decontamination.
Hegseth handed over wartime artifacts including a leather box, belt, and small knife to aid family reconciliation.
Post-war efforts address unexploded ordnance, remains recovery, and Agent Orange cleanup.
These initiatives provide foundation for expanded defense relations.
Vietnam hedges with ties to Russia including potential Su-35 jet purchases.
Hegseth's visit marks 30 years of diplomatic relations and two years of Comprehensive Strategic Partnership.