China deploys more than 100 navy and coast guard vessels around the first island chain

China’s reported deployment of more than 100 navy and coast guard vessels around the first island chain fits a pattern regional officials and outside analysts have been tracking for more than a year. Social posts on X on May 23 cited local ship trackers and maritime AIS data in describing a mixed force of warships, coast guard cutters and support vessels operating across waters near Taiwan and the wider island chain. Reuters reported in December 2024 that Taiwanese security officials had counted about 90 Chinese navy and coast guard ships in waters near Taiwan, the southern Japanese islands and the East and South China Seas, calling that concentration “very alarming.” ### What is the “first island chain” these posts are talking about? Taiwanese officials have described the first island chain as the arc running from Japan through Taiwan and the Philippines and on to Borneo, enclosing China’s coastal seas. That geography matters because it covers the sea lanes and chokepoints between the East China Sea, the South China Sea and the western Pacific. (marinelink.com) The December 2024 deployment that Taiwan flagged was spread across that same belt of water. Reuters, citing a Taiwan security source, reported that roughly two-thirds of the nearly 90 vessels then in the area were navy ships, with the rest made up of coast guard craft. ### How unusual is a count above 100 vessels? (taipeitimes.com) December 2024 was already described by Taiwan as China’s largest maritime deployment in the region in decades. Reuters reported then that Taiwan’s defense ministry raised its alert level after Chinese navy and coast guard ships massed near Taiwan, the southern Japanese islands and the East and South China Seas. (marinelink.com) By late May 2025, Reuters again reported elevated activity. Three regional security officials and military activity documents reviewed by Reuters showed China had been sending larger-than-usual fleets near Taiwan, the southern Japanese islands and the East and South China Seas, with nearly 60 ships counted on May 21 and more than 70 on May 27. Those vessels included guided-missile frigates, destroyers and coast guard boats, according to the report. (straitstimes.com) ### What kinds of ships are typically included in these deployments? Reuters’ May 2025 reporting said the deployments included navy, coast guard and other ships. The documents cited by Reuters also showed China dispatching two aircraft carrier groups, with the Shandong in the South China Sea and the Liaoning off southeastern Taiwan during that period. (kfgo.com) The X posts described on May 23 match that mix rather than pointing to a single declared exercise. Social accounts cited in the card said the force included warships, coast guard cutters and support vessels, echoing the composition regional officials had previously described to Reuters. ### What have Taiwan officials said this activity is meant to do? (kfgo.com) A senior Taiwanese security official told Reuters in May 2025 that China was sending an average of 50 to 70 vessels per day across the first island chain between May 1 and May 27, which the official called a record high for May. The same Reuters report said the official viewed the activity as pressure across the full chain rather than around Taiwan alone. (kfgo.com) Hsieh Jih-sheng, head of Taiwan’s defense ministry intelligence department, said in December 2024 that China’s deployment in the first island chain was aimed at area denial to prevent foreign forces from interfering, according to Reuters. That assessment was Taiwan’s characterization; Beijing did not publicly frame the operation that way in the cited reports. (straitstimes.com) ### What should readers watch for next? Taiwan’s defense ministry and National Security Bureau have been the main official sources for public tallies of Chinese air and maritime activity around the island and across the chain. Reuters’ May 2025 report also relied on regional security officials and military activity documents, suggesting the next concrete update is likely to come from those same government briefings rather than from the social posts themselves. (taipeitimes.com) Any official confirmation would likely focus on vessel counts, ship types and whether carrier groups or coast guard formations are operating north and south of Taiwan. Those were the details highlighted in the December 2024 and May 2025 reporting that now provide the clearest benchmark for judging the new claims. (marinelink.com) (straitstimes.com)