The arrival of the USS Abraham Lincoln aircraft carrier and more than 5,000 US personnel in Pattaya highlights both the strengthening of Thai-US security ties and complex geopolitical dynamics in the region, according to experts.
The Nimitz-class carrier, making its third visit to Thailand in 20 years, was to stay in the country until Sunday to allow its personnel to rest and recuperate while on duty.
However, its visit comes as the United States is at war with Iran, adding a security dimension to what would otherwise be a routine port call.
A longstanding alliance
The USS Abraham Lincoln (CVN-72), the fifth Nimitz-class aircraft carrier of the US Navy, was commissioned on Nov 11, 1989. Measuring about 333 metres long, with a flight deck spanning about 134 feet, it can carry up to 90 aircraft and has a crew of about 5,600.
Powered by two nuclear reactors and four shafts, it can travel at more than 30 knots and operate for 20-25 years before requiring refuelling. Its displacement is around 97,000-100,000 tonnes or more, depending on its operational configuration.
The carrier has taken part in numerous major operations, including Operation Desert Storm, Operation Southern Watch, Operation Enduring Freedom and Operation Iraqi Freedom.
In 1991, it was initially deployed in connection with the Gulf War but was diverted to Operation Fiery Vigil following the eruption of Mount Pinatubo in the Philippines. The carrier helped evacuate nearly 45,000 people from Subic Bay to Cebu.
It also participated in Operation Unified Assistance, providing humanitarian aid following the 2004 Indian Ocean tsunami.
The carrier first visited Thailand in 2006 and returned in 2012, making the current visit its third in two decades.
Security and foreign affairs expert Panitan Wattanayagorn said the visit should not be viewed as an attempt to expand US influence but rather as an effort to strengthen existing cooperation.
He said such cooperation had two dimensions. The first was rest and recuperation (R and R), a longstanding practice in Pattaya that supports the economy.
US military personnel have traditionally visited the resort city since the Vietnam War era in the 1960s and 1970s, when American troops stationed at U-Tapao used it for recreation.
The second dimension involved strengthening logistical arrangements between Thailand and the US under the Cobra Gold framework.
Escort vessels accompanying the carrier could also call at Sattahip for fuel and supplies, reinforcing the two countries’ existing security relationship.
However, Mr Panitan said the strategic implications were more complicated because the US was now at war.
“The carrier that has arrived is a command-and-control platform that has been involved in combat. It symbolises the war with Iran,” he said, noting that its crew had spent more than 250 days at sea before coming to Thailand.
He warned Iran’s Islamic Revolutionary Guard Corps (IRGC) might not regard the visit as ordinary R and R, potentially complicating Thailand’s relations with Tehran.
Thailand should ensure the visit was not perceived as involving enhanced military capabilities or strategic exchanges with the Royal Thai Navy, he said.
“Our arrival in Laem Chabang provides a well-deserved opportunity for our Sailors and Marines to rest and recharge. It also underscores the strong and enduring partnership and alliance between the United States and Thailand,” said Rear Adm Robert E. Loughran, commander, Carrier Strike Group 3.
“What this strike group has accomplished is truly historic. I could not be prouder of the exceptional professionalism and expertise demonstrated by every member of this team during our operations in the US Central Command area of responsibility.”
“Abraham Lincoln’s visit to Laem Chabang is a clear demonstration of our enduring commitment to our allies and partners in Thailand, and we are all very excited to make Thailand the first port visit on our historic deployment,” said Capt Dan Keeler, Abraham Lincoln’s commanding officer.
“This port visit will help us gain a deeper understanding of one another, demonstrate our mutual commitment to the security of the region, and allow our crew to enjoy this beautiful and historic country.”
A complex security web
Mr Panitan said Thailand also needed to consider the sensitivity of its maritime links with Iran and Oman, particularly as Iran exercises influence over the Strait of Hormuz and surrounding routes.
He suggested Thailand should strengthen communication channels with the IRGC and explain the purpose of the US fleet’s visit.
He said the visit was linked to a broader pattern of high-level Thai-US security contacts, including the previous visit by US Under Secretary of War for Policy Elbridge A Colby, Foreign Affairs Minister Sihasak Phuangketkeow’s trip to Hawaii and Army Chief Gen Pana Claewplodtook’s visit to the US.
These developments reflected a “complex web” of security relations during wartime and were normal features of closer cooperation between allies, he said.
Mr Panitan said the carrier’s visit followed a normal route but had taken on a different significance during wartime.
He suggested it served both as a way to “touch base” and reward the crew, while also providing an opportunity for the US fleet commander to meet Thai military commanders without making the engagement appear unusual.
The visit also had implications for the US-China strategic competition in Southeast Asia, he said. China has expanded its influence in Cambodia, Laos and Myanmar, while Japan and Australia face domestic pressures that could limit their ability to balance China’s influence.
Mr Panitan said the struggle for strategic influence was becoming increasingly intense, with every forum and partnership carrying significance. China’s growing involvement in the region, including through the Lancang-Mekong framework and mechanisms outside Asean, could challenge Asean centrality, he said.
Psychological reassurance
Mr Panitan said the visit also coincided with Thailand’s efforts to acquire weapons, missiles and other military equipment from the US, including off-the-shelf systems to strengthen defensive capabilities. These discussions were taking place alongside broader high-level security cooperation.
Rangsit University’s political scientist Wanwichit Boonprong said the US naval visit had considerable psychological significance, demonstrating the enduring strength of the Thai-US alliance and signalling Washington’s renewed strategic engagement in Asean.
He said Thailand remained one of the US’ oldest and closest allies in Southeast Asia, alongside Singapore and the Philippines.
Against the backdrop of the Thailand-Cambodia conflict and questions over Washington’s position, the sight of an American aircraft carrier in the Gulf of Thailand could reassure the Thai public about the strength of bilateral ties.
Mr Wanwichit said the US decision to approve Thailand’s purchase of M142 HIMARS systems, together with Mr Colby’s visit, suggested that military cooperation could be elevated across several levels of capability.
He said this also gave Thailand an opportunity to strengthen its bargaining position with China and encourage Beijing to moderate any perceived bias in its approach to the Thailand-Cambodia dispute.
“For Thailand, we have seen the old ecosystem of close Thai-US relations as longstanding allies,” Mr Wanwichit said. However, he said this relationship must not develop into confrontation or make Thailand appear to be a proxy for either the US or China.
Balancing the powers
Mr Wanwichit said US policy towards Asean had shifted from the distance seen during the earlier Trump administration towards greater engagement, partly because Russia and India were also expanding their roles in Asia.
Russia has sought to deepen military cooperation and arms sales, while India has expanded joint military exercises and is seeking a larger role in regional supply chains and the defence industry. The US therefore faces growing competition for influence even beyond China, he said.
Asked what Thailand stood to gain from the regional balance of power, Mr Wanwichit said Washington had shown flexibility when Thailand maintained a firm position on issues important to its national interests.
In the Thailand-Cambodia dispute, he said the US had repeatedly urged Thailand to show greater flexibility. However, when Thailand refused to back down, Washington adjusted its position and instead offered greater military cooperation in some areas.
On the possibility of further negotiations to reduce US tariffs on Thai goods, Mr Wanwichit said the Trump administration treated economic policy aimed at protecting US national interests separately from military affairs.
“Thailand’s position of not taking sides while maintaining relations with everyone is the right foreign policy and gives Thailand the greatest possible benefit. Every country understands our actions and role,” he said.