Taiwan is among a growing number of flash points in the U.S.-China relationship, which include a trade war, U.S. sanctions and China's increasingly muscular military posture in the South China Sea, where the United States also conducts freedom-of-navigation patrols.
China on Wednesday warned that it is ready for war if there was any move toward Taiwan's independence, accusing the United States of undermining global stability and denouncing its arms sales to the self-ruled island.
The warship sent to the 112-mile-wide (180-km) Taiwan Strait was identified as the Antietam.
Japan-based US #cruiser USS #ANTIETAM CG54 made another passage thru the #Taiwan Strait between Taiwan and mainland #China Wed 24 July, US 7th Fleet confirmed. First such passage since 23 May, 6th this year by US, 9th over the past year (plus 1 French). https://t.co/bjbjuzq7XG pic.twitter.com/5yXpFIO48w— Chris Cavas (@CavasShips) July 25, 2019
"The [ship's] transit through the Taiwan Strait demonstrates the U.S. commitment to a free and open Indo-Pacific," Cmdr. Clay Doss, a spokesman for the U.S. Navy's 7th Fleet, said in a statement. "The U.S. Navy will continue to fly, sail and operate anywhere international law allows."
The voyage risks further raising tensions with China but will likely be viewed by self-ruled Taiwan as a sign of support from U.S. President Donald Trump's administration amid growing friction between Taipei and Beijing.
The United States has no formal ties with Taiwan but is bound by law to help provide the island with the means to defend itself and is its main source of arms.
China has been ramping up pressure to assert its sovereignty over the island, which it considers a wayward province.
On Wednesday, Chinese Defense ministry spokesman Wu Qian told a news briefing on a defense white paper, the first like it in several years to outline the military's strategic concerns, that China would make its greatest effort for peaceful reunification with Taiwan.
"If there are people who dare to try to split Taiwan from the country, China's military will be ready to go to war to firmly safeguard national sovereignty, unity and territorial integrity," he said.
China has repeatedly sent military aircraft and ships to circle Taiwan on exercises in the past few years and worked to isolate it internationally, whittling down its few remaining diplomatic allies.