U.S. marines carry equipment at the Paredes Air Station at Pasuquin, Ilocos Norte province during a joint military exercise in northern Philippines on Monday, May 6, 2024. American and Filipino marines held annual combat-readiness exercises called Balikatan, Tagalog for shoulder-to-shoulder, in a show of allied military readiness in the Philippines' northernmost town facing southern Taiwan.

Military force from the United States, Australian and the Philippines launched a barrage of high-precision rockets, artillery fire and airstrikes to sink a ship Wednesday as part of largescale war drills in waters facing the disputed South China Sea that have antagonized Beijing.

Military officials and diplomats from several countries, along with journalists, watched the display of firepower from a hilltop along a sandy coast in Laoag City on Wednesday in Ilocos Norte, Philippine President Ferdinand Marcos Jr.’s northern home province.

More than 16,000 military personnel from the United States and the Philippines, backed by a few hundred Australian troops and military observers from 14 countries were participating in annual combat-readiness drills called Balikatan, Tagalog for shoulder-to-shoulder, which started on April 22 and will end on Friday.

It’s the latest indication of how the United States and the Philippines have bolstered a defense treaty alliance that started in the 1950s.

Marcos has ordered his military to shift its focus to external defense from decades-long domestic anti-insurgency operations as China’s increasingly aggressive actions in the South China Sea become a top concern. That strategic shift dovetails with the efforts of President Joe Biden and his administration to reinforce an arc of alliances in the Indo-Pacific region to counter China.

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China has angered the Philippines by repeatedly harassing its navy and coast guard ships with the use of powerful water cannons, a military-grade laser, blocking movements and other dangerous maneuvers in the high seas near two disputed South China Sea shoals that have led to minor collisions. Those have caused several injuries to Filipino navy personnel and damaged supply boats.

“We’re under the gun,” Philippine ambassador to Washington Jose Romualdez told The Associated Press in a telephone interview.

“We don’t have the wherewithal to be able to fight all of this bullying coming from China so where else will we go?” Romualdez asked. “We went to the right party which is the United States and those that believe in what the U.S. is doing.”

China has accused the Philippines of setting off the hostilities in the disputed waters by encroaching into what it says are its offshore territories, demarcated by 10 dashes on a map. This has often prompted the Chinese coast guard and navy to take steps to expel Philippine coast guard and other vessels from that area. The Philippines, backed by the U.S. and its allies and security partners, has repeatedly cited a 2016 international arbitration ruling based on the United Nations Convention of the Law of the Sea that invalidated China’s claim over virtually the entire South China Sea on historical grounds.

China did not participate in the arbitration complaint filed by the Philippines in 2013, rejected the ruling, and continues to defy it.

After an hour of the combat-readiness drills, black smoke started to billow from the stern of the mock enemy ship that was struck by missile fire and it started to sink ,as shown on a monitor watched by foreign military guests and journalists. U.S. and Philippine warplanes later dropped bombs on the BRP Lake Caliraya, the target ship, which was made in China but decommissioned by the Philippine navy in 2020 due to mechanical and electrical issues, according to Philippine military officials.

Philippine military officials said the maneuvers would bolster the country’s coastal defense and disaster-response capabilities and claimed they were not aimed at any country. China has opposed military drills involving U.S. forces in the region as well as increasing U.S. military deployments, which it warned would ratchet up tensions and hamper regional stability and peace.

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Washington and Beijing have been on a collision course over China’s increasingly assertive actions to defend its vast territorial claims in the South China Sea, and Beijing’s stated goal of annexing Taiwan, by force if necessary.

In February last year, Marcos approved a wider U.S. military presence in the Philippines by allowing rotating groups of American military forces to stay in four more Philippine military camps. That was a sharp turnaround from his predecessor Rodrigo Duterte, who feared that a larger American military footprint could antagonize Beijing.

China strongly opposed the move, which would allow U.S. forces to establish staging grounds and surveillance posts in the northern Philippines across the sea from Taiwan, and in western Philippine provinces facing the South China Sea.

China has warned that a deepening security alliance between Washington and Manila and their ongoing military drills should not harm its security and territorial interests or interfere in the territorial disputes. The Philippines countered that it has the right to defend its sovereignty and territorial interests.

“An alliance is very important to show China that you may have all the ships that you have, but we have a lot of firepower to sink all of them,” Romualdez said

US and Philippine forces stage combat drills near strategic channel off southern Taiwan

U.S. Army CH-47s takes off at Paredes Air Station at Pasuquin, Ilocos Norte province as it carries the U.S. and Philippine troops during a joint military exercise in northern Philippines on Monday, May 6, 2024. American and Filipino marines held annual combat-readiness exercises called Balikatan, Tagalog for shoulder-to-shoulder, in a show of allied battle readiness in the Philippines' northernmost island town of Itbayat along the strategic Bashi Channel off southern Taiwan. (AP Photo/Aaron Favila)

U.S. Marines and their Filipino counterparts darted out of Black Hawk helicopters during combat drills Monday in the Philippines’ northernmost island town along the strategic Bashi Channel off southern Taiwan — a flashpoint in the military rivalry between Washington and Beijing.

The show of allied battle readiness in Itbayat in Batanes province is part of annual military exercises that started last month, dubbed Balikatan, Tagalog for “shoulder-to-shoulder,” and involving more than 16,000 American and Philippine military personnel.

This year's exercises by the longtime treaty allies — the largest yet — are meant to deter possible aggression. They come against the backdrop of China’s increasingly assertive actions in the disputed South China Sea, where Chinese and Philippine coast guards and accompanying ships have had several increasingly tense faceoffs since last year.

More than 250 French and Australian forces are also participating, along with observers from several allied and security partner nations, led by Japan and European nations. The drills, which began April 22, end later this week.

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In Monday's mock battle scenario, American and Filipino forces took positions at the airfield, ringed by low-lying hills, as three Army CH-47 Chinook helicopters landed to deliver combat supplies.

Marine 1st Lt. Annie Pentaleri said aerial combat reconnaissance and counter-reconnaissance drills were also planned in the far-flung region. The Associated Press was among a small group of journalists invited to attend the maneuvers.

"We are absolutely battle-ready and that’s what we train for day in and day out,” Marine Maj. Robert Patterson said. “It’s important to enhance inter-operability with our Filipino counterparts.”

Washington and Manila say the drills are not directed at any country and are crucial for improving the response to emergencies in the Philippines, one of the world’s most disaster-prone countries.

However, this year's drills focus on territorial defense and are being staged mainly in two of the most sensitive fault lines in the regional rivalry between China and the United States: the disputed South China Sea and the Bashi Channel.

The critical waterway between Taiwan and the Philippines, an important trade conduit laden with international undersea cables, has been closely watched and guarded by Chinese and American forces. China considers Taiwant a part of its territory, to be annexed by force if necessary.

In a telephone call last month, Chinese President Xi Jinping stressed to President Joe Biden that Beijing will not tolerate separatist activities by Taiwan’s independence forces, as well as “exterior indulgence and support,” an apparent reference to Washington’s support for the island.

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Biden raised concerns about China’s actions in the South China Sea, including efforts to impede the Philippines, which Washington is treaty-obligated to defend, from resupplying its forces on the fiercely disputed Second Thomas Shoal.

Derek Grossman, a senior defense analyst at RAND Corporation, said the message of deterrence was important. Philippine President Ferdinand Marcos Jr.'s decision to allow U.S. forces indefinite access to two Philippine air force and naval bases in Cagayan province near Batanes under a 2014 defense pact, “would likely upgrade the U.S. military’s ability to intervene in a Taiwan contingency in a more timely manner," he said.

"Right now, a big concern is the U.S. simply won’t get there in time,” Grossman added.

The Balikatan exercises have included live-fire drills in the disputed South China Sea during joint naval sails by the U.S., France and the Philippines. An aircraft also dropped food and other supplies on a disputed island occupied by Filipino forces as part of the maneuvers in the disputed waters.

Separately on Monday, U.S. and Philippine forces practiced repelling invading forces in the coastal province of Ilocos Norte by firing missiles and artillery rounds on floating targets at sea. The northwestern province faces the South China Sea.

“It was a huge success, the weapons were spot on,” Marine Lt. Gen. Michael Cederholm said.

In escalating high-seas encounters in disputed areas, Chinese coast guard vessels have resorted to water cannons, blocking and other dangerous maneuvers that have left Philippine navy personnel injured and supply boats damaged. The Biden administration has repeatedly warned the U.S. is obligated to defend the Philippines, its oldest treaty ally in Asia, should it come under attack.

China has strongly criticized the exercises, saying the Philippines and countries outside Asia are joining forces against Beijing, warned that the drills could lead to confrontation and undermine regional stability.

Ahead of the drills, China specifically opposed the transport of a U.S. ground-launched missile system to the northern Philippines. No missile was to be fired as the goal was only to familiarize military participants with the hi-tech weaponry in a tropical setting.

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Chinese Foreign Ministry spokesperson Lin Jian expressed China’s grave concern over the deployment of the missile system “at China’s doorstep."

War games risk stirring up troubled waters as Philippines − emboldened by US − squares up to Beijing at sea

Philippine troops watch as a missile hits a target during a live-fire joint U.S.-Philippines exercise. <a href="https://www.gettyimages.com/detail/news-photo/philippine-troops-watch-as-a-javelin-missile-hits-a-target-news-photo/2151659044?adppopup=true" rel="nofollow noopener" target="_blank" data-ylk="slk:Ezra Acayan/Getty Images;elm:context_link;itc:0;sec:content-canvas" class="link rapid-noclick-resp">Ezra Acayan/Getty Images</a>

Philippine troops watch as a missile hits a target during a live-fire joint U.S.-Philippines exercise. 

U.S. Marines joined Filipino counterparts on May 5, 2024, for a mock battle at a telling location: a small, remote territory just 100 miles off the southern tip of the contested island of Taiwan.

The combat drill is part of the weekslong Exercise Balikatan that has brought together naval, air and ground forces of the Philippines and the United States, with Australia and France also joining some maneuvers.

With a planned “maritime strike” on May 8 in which a decommissioned ship will be sunk and exercises at repelling an advancing foreign army, the aim is to display a united front against China, which Washington and Manila perceive as a threat to the region. Balikatan is Tagalog for “shoulder to shoulder.”

Joint Philippines-U.S. naval drills have become an annual event. But as an expert in international relations, I believe this year’s drills mark an inflection point in the regional politics of the South China Sea.

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For the first time, warships taking part in the exercise ventured outside the 12-mile boundary that demarcates the territorial waters of the Philippines. This extends military operations into the gray area where the Philippines’ exclusive economic zone rubs up against the territory claimed by China and designated by its “nine-dash line.”

An infographic shows a map of the South China Sea and surrounding countries, with their claims to the waters represented by dotted lines.

Also for the first time, the U.S. deployed an advanced mobile launcher for medium-range ballistic and cruise missiles of a type that had been banned under the now-defunct Intermediate-Range Nuclear Forces Treaty. In addition, the Philippine navy is showing off its newest acquisition, a South Korean-built missile frigate.

The South China Sea has long been the source of maritime disputes between China, which claims the vast majority of its waters, and nations including Vietnam, the Philippines, Malaysia and Indonesia. In addition, heightened tensions over the status of Taiwan – a territory that the Biden administration has pledged to defend militarily in the event of a Chinese invasion – have made the South China Sea even more strategically important.

Containment at sea

The latest joint maneuvers come amid two developments that could go some way to influence the future trajectory of tensions in the South China Sea. First, the Philippines has grown increasingly assertive in countering China’s claims in the region; and second, the U.S. is increasingly intent on building up regional alliances as part of a strategy to contain China.

The Philippines-U.S. alignment is more robust than ever. After a brief interval during the 2016-22 presidency of Rodrigo Duterte, U.S. warships and military aircraft once again operate out of bases in the Philippines.

Joint naval patrols resumed in early 2023. At the same time, Manila granted U.S. troops unprecedented access to facilities on the northern Batanes islands, which have become the focus of current joint operations.

Meanwhile, Washington has become more vocal in condemning challenges to the Philippines from China.

U.S. officials had carefully avoided promising to protect the far-flung islands, atolls and reefs claimed by Manila for seven decades following the signing of the Mutual Defense Treaty with the Philippines in 1951.

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Only in March 2019 did then-Secretary of State Mike Pompeo assert that the treaty covers all of the geographical area over which the Philippines asserts sovereignty.

In February 2023, Presidents Ferdinand Marcos Jr. and Joe Biden doubled the number of bases in the Philippines open to the U.S. military. That May, the two leaders affirmed that the Mutual Defense Treaty applies to armed attacks that take place “anywhere in the South China Sea.”

Causing waves, rocking the boat

Firmer ties to the U.S. have been accompanied by more combative behavior on the part of the Philippines. In May 2023, the Philippines coast guard introduced demarcation buoys around Whitsun Reef – the site of an intense confrontation with China’s maritime militia a year earlier.

Men in fatigues stand by a missile launcher.
U.S. troops prepare to fire an M777 howitzer during a live-fire exercise in Laur, Nueva Ecija province, Philippines. 

Reports circulated three months later that Philippine marines planned to construct permanent outposts in the vicinity of the hotly contested Scarborough Shoal. And a Philippine coast guard ship, with the commander of the country’s armed forces aboard, approached Scarborough Shoal in November, before being forced to retreat by Chinese maritime militia vessels.

Then in January 2024, the Philippines broke with its adherence to a prohibition on erecting structures on disputed territory, which was part of the 2002 Declaration on the Conduct of Parties in the South China Sea, by installing electronic surveillance equipment on Thitu Island, which sits beyond Scarborough Shoal in the heart of a cluster of disputed formations. This was followed by announced plans to put water desalination plants on Thitu, Nanshan Island and Second Thomas Shoal, making it possible to maintain permanent garrisons on these isolated outposts.

Manila has continued to assert its maritime rights by announcing that armed forces would escort exploration and mining activities in the exclusive economic zone.

Further acts that could be seen as provocative in Beijing followed, including the stationing of a Philippine navy corvette at nearby Palawan Island and a joint flyover by Philippine warplanes and a U.S. Air Force B-52 heavy bomber.

A raft of Chinese responses

It is clear that the deepening of Philippines-U.S. ties has given Manila the confidence to undertake a variety of combative acts toward China. The question is, to what ends?

A more assertive Philippines may end up contributing to the U.S. strategy to deter Beijing from extending its presence in the South China Sea and launching what many in Washington fear: an invasion of Taiwan.

But it is possible that heightened truculence on the part of the Philippines will goad Beijing into being more aggressive, diminishing the prospects for regional stability.

As the Philippines-U.S. alignment has strengthened, Beijing has boosted the number of warships it deploys in the South China Sea and escalated maritime operations around Thitu Island, Second Thomas Shoal and Iroquois Reef – all of which the Philippines considers its sovereign territory.

In early March 2024, two Chinese research ships moved into Benham Rise, a resource-rich shelf situated on the eastern coast of the Philippines, outside the South China Sea. Weeks later, a Philippines coast guard cutter surveying a sandbar near Thitu was harassed not only by Chinese coast guard and maritime militia ships but also by a missile frigate of the People’s Liberation Army Navy, which for the first time launched a helicopter to shadow the cutter.

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Washington has taken no public steps to dampen tensions between Manila and Beijing. Rather, Secretary of State Antony Blinken expressed full-throated support for “our ironclad defense commitments” during a mid-March 2024 stopover in Manila.

Reassured of U.S. backing, Marcos has amped up the rhetoric, proclaiming that Manila would respond to any troublemaking on Beijing’s part by implementing a “countermeasure package that is proportionate, deliberate and reasonable.” “Filipinos,” he added, “do not yield.”

Such an approach, according to Marcos, was now feasible due to the U.S. and its regional allies offering “to help us on what the Philippines requires to protect and secure our sovereignty, sovereign rights and jurisdiction.”

The danger is that as the Philippines grows more assured by U.S. support, it may grow reckless in dealing with China.

Rather than deterring China from further expansion, the deepening Philippines-U.S. alignment and associated Filipino assertiveness may only ramp up Beijing’s apprehensiveness over its continued access to the South China Sea – through which virtually all of its energy imports and most of its exports flow.

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And there is little reason to expect that Washington will be able to prevent an emboldened Manila from continuing down the path of confronting China in the South China Sea.

To Beijing, the prospect of an emboldened Philippines forging active strategic partnerships with Australia, Japan, South Korea, Vietnam and – most troublesome of all – Taiwan makes the situation all the more perilous.