Strengthened Australia-Vietnam Military Cooperation and the Structural Fragility of Australia-China Relations: Implications for the Asian Security Architecture

Executive Summary

On the occasion of a state visit to Australia by To Lam, General Secretary of the Communist Party of Vietnam and President of Vietnam, the two countries agreed to expand military cooperation within the framework of their Comprehensive Strategic Partnership. This development aligns with the trend in which the Australia-led Indo-Pacific security network, built on the foundation of AUKUS, is expanding toward Southeast Asia. Australia-China relations, by contrast, remain unable to escape the structural fragility rooted in fundamental differences in worldview, as diagnosed by former Ambassador Graham Fletcher of the Lowy Institute, with economic interdependence alone serving as a buffer for the relationship. However, given Vietnam's tradition of 'bamboo diplomacy,' it is unlikely that this cooperation will be rapidly elevated to the level of a formal alliance; under the baseline scenario, a phased and gradual deepening is more probable. South Korea, taking into account its structural differences from Australia—namely, its economic dependence on China and geographic proximity—should avoid simply adopting Australia's containment-oriented approach. Instead, it needs a dual-track strategy of selectively participating in minilateral networks while deepening its relationship with Vietnam centered on economic and technological cooperation.

I. Situational Analysis of the Issue

Strengthened Australia-Vietnam Military Cooperation and the Structural Fragility of Australia-China Relations

1. Background and Developments

To Lam, General Secretary of the Communist Party of Vietnam and President of Vietnam, paid a state visit to Australia from August 9 to 12, 2026 [7][13]. This marks the first time a top Vietnamese leader has visited Australia while holding the dual title of General Secretary and President [15]. Vietnam's Ministry of Foreign Affairs officially announced the visit shortly beforehand, and the office of Australian Prime Minister Anthony Albanese also confirmed the schedule for August 9-12 [7].

Vietnam sees the significance of this visit in terms of an institutional elevation of bilateral relations. Pham Hung Tam, Vietnam's Ambassador to Australia, stated in an interview with Nhan Dan that this visit provides "new momentum for effectively implementing the framework of the Vietnam-Australia Comprehensive Strategic Partnership (Đối tác Chiến lược Toàn diện)" [11]. Nhan Dan characterized this visit as "opening a new stage of development in the Vietnam-Australia Comprehensive Strategic Partnership" [15]. Prime Minister Albanese likewise stated through official channels of the Australian Prime Minister's Office that "the Vietnam-Australia relationship is built on deep strategic trust, shared interests, and a common aspiration for the future of the region" [16].

Relations between Australia and China have undergone a clear downward phase since 2017. Graham Fletcher, former Australian Ambassador to China (2019-2023), noted this period of deterioration in an analysis for the Lowy Institute, while assessing that the relationship currently stands on "a more realistic footing" [14]. However, the core point he emphasizes is his diagnosis that fundamental differences in worldview make it difficult for the two countries to achieve a genuine partnership [4].

2. Current Situation

At the summit held in Canberra on August 11, Vietnam and Australia agreed to expand military cooperation. The Turkish outlet Hürriyet Daily News characterized this as "a signal directed at China," reporting that the two countries, as middle powers confronting Beijing's expansion in the Pacific and the South China Sea, agreed to expand military cooperation [1].

Vietnam's state media outlet Nhan Dan reported that the joint statement adopted at this summit encompasses a deepening of relations across multiple areas, including political and security cooperation, economic linkages, and knowledge sharing [9]. VnExpress also reported that President To Lam and Prime Minister Albanese reaffirmed the solid foundation of the two countries' Comprehensive Strategic Partnership and agreed to promote cooperation across a range of sectors [9].

Around the same time, an analysis by former Ambassador Fletcher published through the Lowy Institute caused considerable ripples within Australia's domestic policy circles. The Palauan outlet Island Times, citing AAP, reported that Ambassador Fletcher diagnosed that "it is close to impossible for Australia to have a genuine partnership with China" [4]. The South China Morning Post (SCMP) introduced another axis of this analysis, namely the assessment that "Canberra is quietly confident about the resilience of the relationship, but remains wary of Beijing's attempts to expand the relationship into new areas" [14].

3. Key Actors and Positions

Vietnamreaffirmed, through this visit, its pragmatic hedging strategy. As a socialist state sharing a border with China, managing relations with China is Vietnam's top diplomatic priority, but Vietnam is simultaneously a direct party to the South China Sea sovereignty disputes. The phrase "strategic trust," emphasized by Ambassador Pham Hung Tam [11], suggests that Vietnam approaches cooperation with Australia within a framework of deepening partnership rather than a security alliance. Under the principle of Vietnam's "bamboo diplomacy," there is a clear tendency to avoid openly aligning with any particular camp.

Australiahas continuously expanded its network of middle-power partnerships in the Indo-Pacific region under the Albanese government. According to an EAI analysis, Australia bases its foreign policy on an identity that has "benefited from a rules-based international order for over 70 years," grounding its diplomacy in shared values such as "political, economic, and religious freedom, liberal democracy, the rule of law, racial and gender equality, and mutual respect" [2][5]. This identity underlies not only the expansion of military cooperation with Vietnam but also connects with former Ambassador Fletcher's logic emphasizing fundamental differences in worldview in relations with China.

Former Ambassador Graham Fletcherserves as an important reference point in debates over China policy within Australia's foreign and security policy circles. His diagnosis represents the mainstream view in Canberra's China policy in that it defines the Australia-China relationship not as a subject of emotional restoration or normalization, but as one that is structurally limited to management along a "good enough baseline" [14]. At the same time, he explicitly warned that Chinese military action in the Taiwan Strait could be a variable capable of upending this "new normal" at any moment [4].

Chinahas not put forward a direct response on this matter, but it is widely recognized within the region that the expansion of Australia-Vietnam military cooperation forms part of a multilateral effort to counter Beijing's expanding influence in the South China Sea and the Pacific [1]. The move to strengthen party-to-party and military exchanges between Laos and Vietnam, as reported by the Lao state media outlet KPL [6], is also circumstantial evidence that Vietnam is simultaneously operating a diversified diplomatic and security network within the Indochina region.

4. Key Issues

The first key issue is how far the point of convergence between Vietnam's hedging strategy and Australia's China-containment network can expand. While Vietnam has agreed to expand military cooperation, it remains wary of framing this as an overt anti-China alignment. The reporting frames of Vietnam's state and mainstream media, such as Nhan Dan and VnExpress, consistently emphasize "strategic trust" and "deepening comprehensive partnership" [9][11][15], with no mention of language regarding containment of China. Foreign media outlets, on the other hand, explicitly interpret this as "a signal directed at China" [1]. This perceptual gap itself may become a factor constraining the speed and scope of future deepening cooperation.

The second key issue is whether Australia's China policy has settled into a new equilibrium of "manageable fragility." Former Ambassador Fletcher's analysis reflects the realist consensus among Canberra's policy circles to manage the deteriorated relationship as it stands rather than to reverse it [14]. However, his own acknowledgment that a single variable—the Taiwan issue—could immediately undermine this balance [4] shows that Australia's China policy is fundamentally closer to a provisional truce than to genuine stability.

The third key issue is coherence with U.S. strategy in East Asia. Within the trend of expanding Indo-Pacific security networks analyzed by EAI, AUKUS, the Pacific Islands Forum leaders' summit, and Korea-U.S.-Japan cooperation have all become established as subsidiary pillars of the U.S.-led China-containment structure [10]. The expansion of Australia-Vietnam military cooperation, as a case of incorporating Vietnam—a quasi-security partner rather than a formal ally—into this network, aligns with the trend of U.S. East Asian strategy broadening its base from an alliance-centered approach to a partnership-centered one. However, the extent to which Vietnam becomes deeply embedded in this trend is likely to remain continually constrained by Hanoi's need to manage its relationship with China.

II. In-Depth Analysis of the Issue

Strengthened Australia-Vietnam Military Cooperation and the Structural Fragility of Australia-China Relations: In-Depth Analysis

1. Analysis of Root Causes

The fundamental driver of strengthened Australia-Vietnam military cooperation is the geopolitical position shared by the two countries. Both are on the front line of China's maritime expansion pressure. Vietnam is a direct party to the Spratly and Paracel Islands disputes in the South China Sea. Australia perceives China's security and economic inroads into South Pacific island nations as an issue in its own backyard. Hürriyet Daily News characterized this expansion of military cooperation as a response by "middle powers confronting Beijing's expansion in the Pacific and South China Sea" [1].

Underlying Vietnam's calculus is a pragmatic hedging logic. Vietnam has maintained a policy of "bamboo diplomacy," not entrusting its security entirely to any single power among the United States, China, or Russia. The deepening of the Comprehensive Strategic Partnership with Australia is an extension of this diversification strategy. Vietnam's Ambassador to Australia, Pham Hung Tam, stated that this visit provides "new momentum for effectively implementing the framework of the Vietnam-Australia Comprehensive Strategic Partnership" [11], which shows that Vietnam is choosing to deepen parallel relationships with multiple middle and great powers rather than aligning with a particular camp.

The fragility of Australia-China relations is structural in nature rather than a one-off friction. In his Lowy Institute analysis, former Ambassador Fletcher diagnosed that a "fundamental world-view gulf" makes it difficult for the two countries to reach a genuine partnership [4]. This diagnosis suggests that the issue is not a matter of trade friction or specific government policy choices, but a structural limitation rooted in the heterogeneity of political systems and views on the international order. Australia's foreign policy white paper defines its national identity through values such as "political, economic, and religious freedom, liberal democracy, the rule of law, and racial and gender equality" [2][5]. This value-based identity structures a fundamental divergence in orientation with authoritarian China.

2. Structural Context

Security Structure: Australia's expanding China-containment network should be understood as part of a multilayered network built on the foundation of AUKUS. Since 2023, the United States has been constructing the framework of a U.S.-led security network in the Indo-Pacific. Under AUKUS, the implementation plan for supplying nuclear-powered submarines to Australia has become more concrete, and discussions on "Pillar Two," covering advanced dual-use technology cooperation, have also gained momentum [10]. During the same period, moves toward the South Pacific continued, including a security agreement with Papua New Guinea, the U.S.-Pacific Islands Forum leaders' summit, and an undersea cable project in the South Pacific involving Australia and Japan [10]. The expansion of cooperation with Vietnam is positioned as this network's extension toward Southeast Asia.

Economic Structure: Despite security tensions, economic interdependence has served as a buffer in Australia-China relations. Citing former Ambassador Fletcher's analysis, the SCMP reported that following a clear downward phase since 2017, the relationship now stands on "a more realistic footing" [14]. The core of this analysis is that Canberra is quietly confident about the resilience of the relationship but maintains vigilance against Beijing's attempts to expand the relationship into new areas [14]. The two countries are also currently reviewing their decade-old free trade agreement [14]. This reflects Australia's characteristic dual-track structure, in which containment in the security domain runs in parallel with managed engagement in the economic domain.

Political Structure: The domestic political calendar of Vietnam's Communist Party system is also part of the context for this visit. President To Lam's visit took place right after the conclusion of Vietnam's 14th Party Congress and the first session of the 16th National Assembly [6]. It is possible that, under the new leadership, the need to demonstrate diversified foreign relations domestically was reflected in the timing of the visit.

3. Historical Precedents and Comparable Cases

Australia's middle-power coalition diplomacy is not a new phenomenon. Ever since Australian forces covered the retreat of U.S. and South Korean troops at the Battle of Kapyong in 1951 during the Korean War, Australia has continuously built a network of partners under the U.S. alliance system [8]. This deepening of military cooperation with Vietnam can be read as an attempt to project this accumulated middle-power diplomatic asset into Southeast Asia.

The rise and fall of Australia-China relations itself follows a recurring pattern. The sharp deterioration after 2017 and the recent settling into a "new normal" trace a trajectory that began with a collapse of trust following the emergence of evidence of Chinese interference in Australian domestic politics, followed by trade retaliation, and then a phase of relationship management following the formation of the Albanese government. The Taiwan-related variable that former Ambassador Fletcher warns of is a potential factor that could once again disrupt this trajectory; the Palauan outlet Island Times reported that he pointed out that "a variable such as Chinese military action against Taiwan could overturn the current 'new normal'" [4].

When viewed from within the broader structure of U.S.-China competition, Australia's approach stands in contrast to the hedging patterns shown by other ASEAN countries in the region. Indochinese countries such as Laos have taken an approach of strengthening party-to-party and state-to-state cooperation with Vietnam while simultaneously managing their relations with China [6]. Vietnam's approach to Australia represents, within this regional hedging pattern, an expansive case of broadening its security partners to include a Western middle power.

4. Key Variables in the Development of the Issue

First is the situation in the Taiwan Strait. As explicitly noted by former Ambassador Fletcher, Chinese military action against Taiwan is the single largest variable capable of fundamentally reshaping the "new normal" in Australia-China relations [4]. In this event, Australia would face pressure to join a U.S.-led response, and military cooperation with Vietnam would also face a genuine test.

Second is the direction of the review of the Australia-China free trade agreement [14]. Whether Australia's dual-track strategy of separately managing security and economic issues is adjusted in the wake of this review could become a compass for the future direction of its China policy.

Third is the stability of Vietnam's new leadership's foreign policy orientation. Depending on how the To Lam regime maintains the balance of bamboo diplomacy, the speed and scope of deepening military cooperation with Australia could vary.

Fourth is the pace of implementation of AUKUS Pillar Two and the South Pacific security network [10]. How cooperation with Vietnam interlocks with this network will determine the substantive security implications of this issue.