China military build-up Indo-Pacific regional tensions have been driven by an unprecedented expansion of Beijing's armed forces, according to US and open source reporting, with stepped up air, naval, space, cyber and missile capabilities aimed at broad regional influence.
At a House Armed Services Committee hearing John Noh, performing the duties of assistant secretary of defense for Indo Pacific security affairs, said China aims to dominate the Indo Pacific and that President Xi Jinping ordered the PLA to be ready to invade Taiwan by 2027.
Navy Adm. Samuel Paparo, commander of US Indo Pacific Command, told lawmakers that China demonstrated aggressive behavior and modernization across artificial intelligence, hypersonic missiles and space based capabilities, and he warned the PLA's operations against Taiwan escalated by 300 percent in 2024.
Open source analysts documented a record year of activity in 2025, especially around Taiwan, the South China Sea and near Japan, as reported by Bonny Lin and colleagues, and by ChinaPower and Japan and Taiwan defense sources.
According to Taiwan's Ministry of National Defense and the 2025 analysis, PLA aircraft made 3,764 incursions into Taiwan's ADIZ in 2025, up 22.4 percent from 2024, and average monthly sorties rose to 319 after May 2024, a 129 percent increase versus the earlier period.
China staged two large named drills around Taiwan in 2025, Strait Thunder 2025A and Justice Mission 2025, with the April drills logging 135 aircraft sorties and 38 naval vessels, and the December drills simulating blockades while disrupting 857 international flights, as reported by Taiwan civil aviation and defense authorities.
The PLA increased South China Sea operations, with ChinaPower reporting 163 MSA recorded activities in 2025, including a record 55 live fire events, and the China Coast Guard more than doubled its presence around Scarborough Shoal compared to 2024.
Far Seas Expansion And Regional Responses
China also pushed beyond the First Island Chain, with both Liaoning and Shandong operating simultaneously in the Pacific and carriers performing more days outside the chain, 58 combined days in 2025 versus 32 in 2024, according to Japan Ministry of Defense reporting.
Beijing commissioned the third carrier, Fujian, in November 2025, and analysts recorded unprecedented PLAN operations near Australia and New Zealand, live fire drills in the Tasman Sea, naval task groups circumnavigating Australia, and far seas coast guard patrols reaching the Northern Pacific.
Military ties with Russia showed mixed signals, with six joint exercises in 2025 down from 14 in 2024, yet including the first joint submarine patrol and a joint aerial patrol that flew toward Tokyo, as noted in the 2025 open source review.
Observers from the Australian Strategic Policy Institute warn Beijing seeks gradual, persistent expansion through naval modernization, coast guard and militia activity, port access and security cooperation to normalize presence across the Southwest Pacific, Indian Ocean and Australia maritime approaches.
