Intensifying Security Competition in the Pacific: The Structure of U.S.-China Strategic Competition and Policy Directions

Executive Summary

The South Pacific has been reshaped into a permanent theater of U.S.-China competition since the Solomon Islands signed a security agreement with China in 2022. Following China’s SLBM test launch and lack of prior notification in July, 40 countries signed a U.S.-led joint statement. However, the Pacific Islands Forum (PIF) failed to adopt a statement condemning China, due to its consensus-based decision-making and Beijing's years of economic engagement in the region. This incident is not a standalone crisis but a phase in a structural competition, as it involves overlapping tracks: a security track concerning prior notification and a development model track exemplified by China's campaign to align Pacific nations with its Five-Year Plan. For the United States, a realistic approach would be to focus on deepening its existing network of bilateral security agreements rather than expanding multilateral statements. China is likely to adopt an asymmetric strategy, showing symbolic flexibility on military issues while maintaining the pace of its economic engagement. For regional states, the quiet erosion of unity poses a greater threat than overt intervention. Therefore, enhancing transparency and procedural improvements within the PIF are proposed as a practical path toward stabilization.

I. Situational Analysis

Situational Analysis: Intensifying Security Competition in the Pacific

1. Background and Developments

The reshaping of the South Pacific into a theater of U.S.-China security competition dates back to the Solomon Islands' signing of a security agreement with China in 2022 [6][5]. This agreement served as an immediate alarm bell for Canberra and Washington. The U.S. response that followed took the form of rebuilding its security network. In 2023, it signed a security agreement with Papua New Guinea. The same year, it held the U.S.-Pacific Island Country Summit [5]. Plans to supply nuclear-powered submarines under the AUKUS framework involving Australia, the United Kingdom, and the United States also took concrete shape [10].

A decisive turning point in this dynamic occurred on July 6, when China test-launched a submarine-launched ballistic missile (SLBM) into the South Pacific [1][5]. Beijing reportedly provided only brief notification to a very small number of countries beforehand [5]. According to Tongan media outlet Matangi Tonga, this launch prompted 40 countries, including Australia, New Zealand, the Marshall Islands, and Palau, to sign a U.S.-led joint statement demanding prior notification for future missile tests [1]. Around the same time, the Palau Island Times reported that China had likely conducted an organized campaign to align Pacific nations with its latest Five-Year Plan. This was based on a report from the Washington-based Alliance for Securing Democracy [7].

2. Current Situation

Beijing immediately countered the 40-nation joint statement, arguing it was a double standard [1]. Chinese diplomatic authorities assert that Western countries do not apply the same standards to their own drills or tests [1]. Prior to this, the Pacific Islands Forum (PIF) Foreign Ministers' Meeting failed to adopt a joint statement condemning China's SLBM launch. This was the result of a combination of the institutional vulnerability of its consensus-based decision-making and China's years of economic engagement [5]. The public pressure campaign led by New Zealand actually provoked a backlash from more moderate island nations [5].

On the military front, the joint Japan-U.S.-Australia military exercise 'Orient Shield 26' is scheduled from September 8 to 24 [4]. China's state-run Global Times criticized this as a typical example of bloc politics disguised as an interoperability exercise. The paper argued that it injects confrontational elements and forward-deployed firepower into the Asia-Pacific's fragile security environment [4]. In parallel, the Five Eyes intelligence alliance is discussing strengthening counter-terrorism cooperation using AI [17]. New Zealand's intelligence agencies separately raised allegations of large-scale espionage by China, which Beijing flatly denied as false claims stemming from a Cold War mentality [15].

The Palau Island Times points out that the essence of this situation lies not in overt espionage but in the exercise of foreign influence that quietly undermines regional unity. International law experts have warned that transparency and collective decision-making will be crucial ahead of the Pacific Islands Forum Leaders' Meeting [9].

3. Key Actors and Positions

Chinadefines its SLBM test launch as a sovereign military activity and counters the demand for prior notification as a Western double standard [1]. Simultaneously, it is attempting to bring the development models of Pacific island nations into its own orbit through a campaign to align them with its Five-Year Plan [7]. Its state media are engaging in a narrative competition, framing the U.S.-Japan-Australia joint exercises as a product of bloc politics [4].

United Statesafter failing to secure a condemnation statement through the multilateral channel of the PIF, is shifting its strategy toward bilateral security agreements and separate statements with like-minded countries [5]. A CFR report warns that the United States lacks the materiel and industrial capacity needed for deterrence in the Western Pacific, including in a Taiwan contingency [3]. This suggests that Washington's engagement in the Pacific is not a matter of will but is constrained by the physical limitations of resource allocation.

Australia and New Zealandare the most active actors in countering China in this incident. Australia led the discussions for condemnation at the PIF [5] and is recently hedging against both uncertainty from Washington and assertiveness from Beijing by deepening relations with non-regional countries like Thailand [13]. New Zealand has heightened vigilance at the intelligence alliance level by raising allegations of Chinese espionage [15].

Pacific Island Nations, including Palau and the Marshall Islandsare in a dual position: while they are signatories to security agreements, they find it difficult to completely exclude Chinese economic engagement. Media in these countries frame the issue of foreign influence less as one of overt intervention and more as an erosion of regional unity [9].

4. Key Issues

The dispute over double standards regarding prior notification is merely a surface-level issue; at its core lies a competition over the right of Pacific island nations to choose their own development models [7]. The PIF's consensus-based system structurally functions as a mechanism to block resolutions condemning China [5], prompting the U.S. and its allies to shift from multilateral channels to minilateral statements with like-minded countries. The narrative competition over the justification and interpretation of military exercises is also intensifying. Washington, Tokyo, and Canberra frame 'Orient Shield 26' as enhancing interoperability, while Beijing defines it as a bloc-based provocation [4]. This narrative gap is likely to narrow the hedging space for small and medium-sized countries in the region.

II. In-Depth Analysis

In-Depth Analysis: Structural Causes and Key Variables in the Pacific Security Competition

1. Analysis of Root Causes

The immediate trigger for the current situation was China's SLBM test launch and its lack of prior notification [1]. However, viewing this as a one-off provocation would be a misdiagnosis of the cause. The root causes can be divided into two layers.

First is the normative vacuum surrounding notification practices. China only provided brief notification to a very small number of countries and did not follow the practice of advance warning to the extent demanded by the United States [5]. Beijing countered this by framing it as an issue of double standards. Its logic is that Western countries do not apply the same transparency standards to their own missile tests or exercises [1]. This rebuttal is not without merit. Large-scale exercises by the United States and its allies often have a limited scope of prior consultation as well. The problem is that the norm of notification is closer to a political custom than a legal obligation under international law. Since the norm is not codified, both sides have significant room to interpret it to their own advantage.

Second is the competition over the development models of Pacific island nations. China's campaign to align these nations with its Five-Year Plan is a step beyond providing infrastructure loans or security agreements [7]. The Alliance for Securing Democracy report noted that Chinese diplomats likely conducted an organized campaign to persuade Pacific governments that following Beijing's development and governance model would lead to economic, environmental, and social benefits [7]. This is an attempt to influence the very policy design of Pacific island nations, going beyond competition for individual project contracts. Experts cited by the Palau Island Times assess that this type of influence is actually more threatening than overt espionage. This is because it quietly erodes regional unity [9].

2. Structural Context

Security Structure: The South Pacific has been reshaped into a permanent theater of U.S.-China competition since the Solomon Islands signed a security agreement with China in 2022 [6][5]. In response, the United States has rebuilt its network by signing a security agreement with Papua New Guinea and institutionalizing the U.S.-Pacific Island Country Summit [5][10]. This structure is fundamentally asymmetric. China penetrates the region through economic engagement with individual countries, whereas the United States responds through institutional channels like multilateral statements or summits. The recent 40-nation joint statement is an extension of this approach [1]. However, multilateral channels have structural limitations. The Pacific Islands Forum's consensus-based decision-making is a prime example. This has led to a situation where moderate island nations, having received years of economic engagement from China, effectively block the adoption of statements condemning Beijing [5].

Economic Structure: The fiscal structures of Pacific island nations are characterized by a high degree of external dependence, typical of small economies. China's infrastructure investments are often provided as no-strings-attached loans, which are considered more accessible than Western aid. A structure where this economic engagement is converted into political leverage on security issues is already well-established.

Military Structure: U.S. force posture in the Western Pacific faces the physical constraint of having to respond to multiple theaters simultaneously. It has been pointed out that a prolonged conflict in another region would inevitably create a power vacuum in Asia [3]. In this context, the increasing importance of joint exercises with allies like Japan and Australia is a natural consequence. 'Orient Shield 26' is a case in point [4]. However, Chinese state media frame this as a repackaging of bloc politics, criticizing it as an act that injects confrontational elements into the regional security environment [4]. The Five Eyes' enhanced AI cooperation on counter-terrorism can also be read in the same context as an expansion of the intelligence alliance's functions [17].

3. Historical Precedents and Comparative Cases

The current situation is akin to a repeat of the 2022 turmoil over the Solomon Islands' security agreement. Then, too, a bilateral agreement with an individual island nation became a catalyst that shook the entire regional security landscape. What is different this time is the simultaneous occurrence of a military act—the SLBM test—and a normative act—the Five-Year Plan campaign. This shows a pattern where two tracks, security and development models, are running in parallel.

A comparison with the case of the Taiwan Strait is also relevant. Beijing's approach to Taiwan's Han Kuang exercises—refraining from official comment until the final day and then dismissing the drills as a wasteful farce [11]—is seen as a new form of ambiguity strategy aimed at reducing predictability. The method of notification for the SLBM test in the Pacific follows a similar pattern. It is a method that minimizes the grounds for international backlash by providing minimal notification, while still clearly sending a military signal.

The dynamic of New Zealand raising espionage allegations and China countering with accusations of a 'Cold War mentality' [15] is a carbon copy of the discourse on vigilance against Chinese espionage in Western countries in the late 2010s. However, the nature of the impact is different this time, as a relatively small actor—a Pacific island nation—has emerged as a direct party to the issue.

4. Key Variables Shaping Future Developments

The first variable is the outcome of the Pacific Islands Forum Leaders' Meeting to be held in Palau. There is a precedent of a statement condemning China failing at the preceding Foreign Ministers' Meeting [5]. It is highly likely at present that the summit will also result in the status quo being maintained without a statement. In this case, the United States will have a greater incentive to shift its focus from multilateral channels to deepening bilateral security agreements.

The second variable is whether China changes its notification practices. If Beijing adheres to its double-standard logic and maintains its current approach, the trend of more countries joining the 40-nation statement could continue. Conversely, if it accepts some level of notification practice, the intensity of the conflict will decrease.

The third variable is the attitude of moderate island nations. Whether the countries that have received Chinese economic engagement continue to block condemnation statements through the consensus system, or pivot to align with pressure from New Zealand and Australia, will determine the effectiveness of the regional multilateral organization.

The fourth variable is U.S. resource allocation. If conflicts in other regions become protracted, widening the power vacuum in the Western Pacific [3], Washington may limit its response toward Pacific island nations to diplomatic statements rather than military engagement. This could lead to a credibility problem for Washington's security commitments among regional countries.