The US navy renewed calls on Thursday for more ship visits to Vietnam against the backdrop of a dramatic breakdown in relations between Vietnam and its giant neighbor, China.
The Seventh Fleet, which guards US interests in the Pacific, restated its desire for stronger naval ties with Vietnam in a statement sent to Reuters, just as Hanoi looked to be running out of options in its territorial row with Beijing.
Anti-China riots broke out this week in Vietnam, killing more than 20 people and setting fire to factories perceived to have been Chinese-owned, after China towed a giant oil rig into waters claimed by both nations in the South China Sea.
"We are interested in engaging with all our partners in the South China Sea and would welcome increased port visits with Vietnam," fleet spokesman Commander William Marks said in an emailed response to questions about US naval relations with Vietnam.
The United States and Vietnam have been gradually deepening military ties in the face of what they perceive as Chinese expansion in the South China Sea, but Hanoi has so far limited US port calls to one visit of up to three ships each year.
Vietnamese military officials say they are intensifying talks with US counterparts over deeper naval engagement, but are sensitive to China's reaction to this development.
"We're talking to US but it is too early to say how the tensions now will change our approach," one Vietnamese military source said. "We have a lot to consider."
Alarmed at China's military rise and territorial assertiveness, Vietnam has broadened a host of military relationships in recent years, most notably with its Cold War-era patron, Russia, and India.
Vietnamese military officials also keep close ties with the Philippines, which is also locked in a worsening territorial dispute with China in the South China Sea.
China and Vietnam fought a brief but bloody border war in 1979, and clashed at sea in 1988, when China occupied its first holdings in the strategic Spratly islands.
The US navy is also keen for more extensive exercises with Vietnam's expanding navy, which now includes state-of-the-art Russian-built ships and Kilo-class submarines.
A search-and-rescue exercise off Vietnam's central coast last year marked the first time ships from the two navies had maneuvered together. "Any time we can increase the complexity of an exercise, it improves the communication and interoperability between our navies," Marks said.
"The overall goal is improved security and stability in the region, and working together is a big part of that."
US military officials said the US navy had not changed deployments due to the Sino-Vietnamese crisis but was conducting daily surveillance flights over the South China Sea.
The Seventh Fleet's command ship, the USS Blue Ridge, and a destroyer are also currently in the South China Sea.
Carl Thayer, an expert on the Vietnamese military at the Australian Defense Force Academy in Canberra, said he believed Hanoi should seize any opportunity to expand military engagement with the United States, including intelligence sharing.
"At this point, kissing up to the US has got to be in Vietnam's long-term interests, as well as being a vital tactic in the short-term," he said.
"It is one of the only options Vietnam's got right now."