Vietnam's Bamboo Diplomacy at Scale: Spratlys Reclamation, Strategic Partnerships, and the 2026 Balance

Spratly island building reaches 770 acres, second only to China #

AMTI's December 2024 update at CSIS recorded that Vietnam created approximately 770 acres of new land across its Spratly outposts between November 2022 and November 2024, lifting cumulative Vietnamese reclamation to roughly 955 acres and closing the gap with China's earlier 3,200 acre buildout (2013 to 2016). Barque Canada Reef remains the centerpiece, expanded from 238 acres in late 2022 to about 412 acres by late 2024, with a runway capable footprint exceeding 3,000 meters that places it on par with Subi and Mischief Reefs in physical scale. Pearson Reef and Tennent Reef each gained more than 100 acres, while Discovery Great, Ladd, Sand Cay, and South Reef saw secondary deepening. Through 2025, AMTI satellite imagery and Reuters Hanoi reporting flagged additional dredging at Barque Canada (harbor deepening), Pearson (channel widening), and Tennent (causeway works), suggesting a shift from horizontal expansion to vertical hardening (hangars, sensor towers, ammunition storage).

Vietnam still avoids the explicit militarization rhetoric Beijing used in 2015, but the operational signature, dredged harbors, defensive emplacements, and longer runways, mirrors a sovereignty hardening campaign. The strategic implication is asymmetric: Vietnam cannot match People's Liberation Army Navy (PLAN) tonnage, but a denser Spratly footprint raises the cost of any Chinese coercive escalation against Vanguard Bank or the Reed Bank periphery, and creates logistical depth for Vietnam Coast Guard and Vietnam People's Navy patrols that previously had to rotate from Cam Ranh Bay. The dredging tempo, estimated by AMTI at roughly 32 acres per month during peak 2024 phases, also reflects an industrial capacity Vietnam built indigenously after observing China's 2014 to 2016 campaign, with cutter suction dredgers reportedly operating from Khanh Hoa province ports under People's Army Corps of Engineers oversight, a self contained build chain that limits sanctions exposure.

Bamboo diplomacy operationalized: four CSP upgrades in thirteen months #

The bamboo diplomacy doctrine, articulated by Nguyen Phu Trong in 2016 and codified in the December 2021 foreign affairs conference, frames Vietnam's posture as a bamboo trunk (firm sovereignty), flexible branches (multidirectional partnerships), and deep roots (Communist Party legitimacy, national independence). Between September 2023 and October 2024 Hanoi executed the most aggressive partnership upgrade cycle in its post Doi Moi history. The United States CSP (September 10, 2023, signed during President Biden's Hanoi visit) leapfrogged two tiers in a single move, the first such jump in Vietnamese diplomatic practice, and was followed within ten weeks by the Japan CSP (November 27, 2023), then Australia (March 7, 2024), and France (October 7, 2024, the first European Union member state at this tier). Vietnam now holds CSP relationships with eight countries (China 2008, Russia 2012, India 2016, South Korea 2022, plus the four 2023 to 2024 entrants), a structure deliberately designed to prevent any single power from monopolizing leverage.

The economic ballast is real: the United States is Vietnam's largest export market (roughly USD 119 billion in 2024 per the United States Census Bureau), Japan is the top official development assistance source (cumulative JPY 3 trillion plus), Australia anchors the Sangre Grande LNG project (a USD 1.4 billion Woodside led import terminal feeding southern Vietnam's gas to power transition), and France reopens Indo Pacific space through Nouvelle Caledonie and submarine technology adjacency. Each CSP includes a defense pillar, but only the Russian and Indian agreements include arms transfer commitments at scale, a deliberate bamboo branch flexibility. The Sangre Grande LNG project illustrates the economic depth of these partnerships: Woodside and PetroVietnam Gas (PV Gas) signed the 2024 framework for a 3.6 million tonnes per annum import terminal feeding the Nhon Trach 3 and 4 gas to power complex (1.6 gigawatts combined), with first cargo targeted for 2027, anchoring Australia's claim to a non security pillar that complements the defense CSP architecture. France's October 2024 entry, formalized during President Vo Van Thuong's successor To Lam visit to Paris, included a satellite cooperation memorandum, civil nuclear engagement under the Vietnam Atomic Energy Institute, and Airbus follow on for the C-295, creating European Union diplomatic redundancy if United States policy shifts after the 2024 election cycle.

Defense procurement diversification: from Russian dependence to a six supplier matrix #

SIPRI's 2025 arms transfers database shows Russia supplied roughly 80 percent of Vietnamese major arms imports during 2010 to 2021, falling to under 50 percent in 2022 to 2024 as Moscow's industrial base struggled under sanctions and Ukraine war demand. Hanoi's response has been a controlled diversification anchored on three pillars. First, indigenous and Israeli electronics: the TC-2 BMP infantry fighting vehicle program (a Vietnamese remanufactured BMP-1 with Belarus or domestic optics) entered serial production in 2024, while Israel Aerospace Industries delivered Spike LR2 anti tank missiles and EXTRA rocket systems through a USD 500 million plus pipeline reported by Reuters and Israel Defense in 2024. Second, the India BrahMos contract: Vietnam became the second export customer (after the Philippines) when New Delhi confirmed a USD 700 million plus order for shore based BrahMos coastal defense batteries, with first delivery in March 2025 confirmed by India's Ministry of External Affairs, a step explicitly framed under the 2016 CSP.

Third, Western inroads: Bechtel filed a USD 8 billion proposal in 2024 for the North South high speed rail (dual use logistics value), Lockheed Martin and Boeing pitched C-130J and F-16 platforms during the 2024 Vietnam International Defense Expo, and Airbus delivered the first C-295 maritime patrol airframe upgrades. The transition is sequenced to avoid abrupt Russian rupture (S-300, Kilo class submarine, Su-30MK2 fleets remain Russian dependent through 2030), but the marginal procurement is now decisively non Russian.

ASEAN Code of Conduct draft, the Philippines hotline, and Cam Ranh Bay #

The 2024 single draft Code of Conduct (COC) text completed its third reading at the ASEAN China Joint Working Group in Manila in March 2025, with ASEAN chair Malaysia targeting a 2026 substantive agreement window. Vietnam's negotiating position, summarized in the Vietnam Ministry of Foreign Affairs August 2024 statement, insists on (1) United Nations Convention on the Law of the Sea (UNCLOS) 1982 as the legal anchor, (2) third party rights (no veto for any single claimant on external partnerships), and (3) legally binding language on militarization, three positions that align Hanoi closer to Manila than to Beijing. The November 2024 Hanoi to Manila direct military hotline, signed by Vietnam Defence Minister Phan Van Giang and Philippines Secretary Gilberto Teodoro Jr, is the first bilateral ASEAN claimant hotline outside the China centric infrastructure, and was paired with a coast guard memorandum on incident deconfliction. Cam Ranh Bay remains the operational pivot: the 2002 Russian withdrawal converted it to an international logistics port, and through 2024 to 2025 it hosted United States Navy Military Sealift Command vessels, Indian Navy frigates (annual MILAN exercises), Japanese Maritime Self Defense Force ships, and Australian Anzac class frigates.

Hanoi's three nos plus one (no military alliances, no foreign bases, no siding against third countries, plus no use of force or threat of force) holds in letter, but Cam Ranh's logistics access regime functions as an alliance hedge in practice.

The Hanoi-Beijing balance: CSP coexists with sovereignty hardening #

Xi Jinping's December 2023 state visit upgraded the Hanoi-Beijing relationship to a shared future community CSP, with sixteen new bilateral agreements covering rail (Lao Cai to Hai Phong corridor), critical minerals, agricultural trade, and cross border industrial parks. China remains Vietnam's largest two way trade partner (USD 205 billion in 2024 per Vietnam General Statistics Office), the dominant intermediate inputs supplier (electronics, textiles, steel), and a critical foreign direct investment source (USD 4.5 billion registered in 2024). Yet during the same period, Hanoi accelerated Spratly reclamation, deepened the BrahMos pipeline (a system explicitly designed against PLAN surface combatants), and expanded coast guard incursions at Vanguard Bank and Tu Chinh. The 2025 Reuters Hanoi reporting on undersea cable diversification (Vietnam joined the SJC2 and ADC consortia, reducing dependence on the China adjacent APG cable) and the 2024 rare earth processing memorandum with Australia signal a quiet decoupling at the strategic margin.

The Vietnamese formula, summarized informally as struggle and cooperate (vua dau tranh vua hop tac), allows escalation in maritime domains and cooperation in trade and party to party channels to coexist. The risk vector is a Beijing miscalculation: a coercive Chinese Coast Guard or maritime militia action at Vanguard Bank in 2026, especially during a Vietnam National Assembly transition window, would force a public rupture that the bamboo doctrine is engineered to avoid.

2026 outlook: stress test for the bamboo doctrine #

Three vectors define the 2026 outlook. First, the COC negotiation: a substantive agreement is unlikely if Beijing rejects UNCLOS anchoring and third party rights, a rejection that would push Vietnam closer to a Philippines style 2016 arbitral award strategy without filing one. Hanoi's likely move is a coordinated Vietnam-Philippines-Malaysia statement on UNCLOS primacy at the August 2026 ASEAN summit. Second, defense procurement: SIPRI projects Vietnam's 2025 to 2027 arms imports at USD 5.5 to 6.5 billion cumulative, with India, Israel, and South Korea capturing the majority of new orders.

The BrahMos follow on (a second battery tranche under negotiation per Indian Ministry of External Affairs March 2025 readout), a possible Spike NLOS deal, and a long range artillery selection (K9 Thunder versus Caesar 155 millimeter) are the marquee 2026 decisions. Third, the Spratly buildout's vertical phase: AMTI's 2026 imagery cycle will likely confirm hangar completion at Barque Canada and sensor activation at Pearson, moving Vietnam from a quantitative reclamation story to a qualitative hardening story that draws sharper Chinese responses. The strategic question for Hanoi's 14th Party Congress (January 2026) is whether the bamboo doctrine survives intact, or whether the four 2023 to 2024 CSPs and the Spratly hardening have already pushed Vietnam into a soft alignment that the doctrine officially denies. Our assessment is that the doctrine holds in 2026 (the cost of explicit alignment exceeds the benefit), but the operational behaviour increasingly resembles a hedged tilt toward the Quad adjacent coalition, with China the residual relationship rather than the anchor.

Sources #

• Vietnam's Major Expansion in the Spratly Islands
• Vietnam, US sign comprehensive strategic partnership
• Japan and Vietnam upgrade ties to highest level partnership
• Australia and Vietnam upgrade to comprehensive strategic partnership
• France and Vietnam elevate relations to comprehensive strategic partnership
• SIPRI Arms Transfers Database, Vietnam recipient profile
• India delivers first BrahMos missiles to Vietnam
• Military and Security Developments Involving the People's Republic of China
• Vietnam, Philippines sign coast guard and military hotline agreements
• Vietnam joins SJC2 and ADC undersea cable consortia
• Vietnam Foreign Affairs White Paper, bamboo diplomacy doctrine
• Sangre Grande LNG terminal, Woodside Energy and PetroVietnam