25 fighter jets and nuclear-capable heavy bombers flew into Taiwan's air defense identification zone on Monday as the Theodore Roosevelt Carrier Strike Group sailed in the vicinity.
Jose Manuel Romualdez said the U.S. would increase the number of ships in the South China Sea "to protect the seaway" from Chinese threats to other nations' sovereignty.
"We have a serious commitment to Taiwan being able to defend itself," Biden's secretary of state said.
A pair of People's Liberation Army Navy vessels were detected east of Taiwan as the country's defense developer began a new round of missile tests.
State Department spokesperson Ned Price referenced the 1979 Taiwan Relations Act and said the U.S. would continue to support peace and stability in the Taiwan Strait.
USS John S. McCain's second passage through the Taiwan Strait this year coincided with the Chinese military's dispatching of 15 warplanes around Taiwan on Wednesday.
The radio correspondence was recorded on Tuesday as four Chinese warplanes entered Taiwan's air defensive identification zone—the fourth day in April Taipei has reported similar activities.
Lawmakers in Taipei were told that Taiwanese maritime forces would shoot down Chinese drones if the military hardware crossed into the territorial airspace of its South China Sea islands.
Ma Chen-kun, a China military affairs analyst based in Taipei, likened the region to the Balkans before the outbreak of the First World War.
The democratic island is one of the flashpoints where the simmering U.S.-China confrontation could escalate into open conflict.
A spokesperson for the Chinese navy said similar exercises would occur on a "regular basis," while Taiwan's defense ministry said it had a handle on all developments in the skies and seas around the island.
At least 48 people were killed in the crash, which occurred inside a tunnel close to the eastern city of Hualien.
The island's intelligence bureau says pressure on Taipei will increase around the Chinese Communist Party's centennial this summer and Xi's likely re-election next year.
Taiwan's coast guard has predicted more maritime PLA activity as relations between Taipei and Washington continue to warm.
NASA's Send Your Name to Mars project has attracted more than 18 million participants, including 4 million from China, where local reports say some are boycotting.
Analysts in Beijing and Taipei said the Chinese military's pincer movement around Taiwan on Monday was the PLA's way of showing it could isolate the island in the event of a conflict.
The audio clip, reportedly of an exchange between military pilots from Taiwan and China, is said to have taken place on Monday as 10 People's Liberation Army warplanes flew around Taiwan.
The People's Liberation Army sent at least 11 warplanes into the skies around Taiwan on Monday, with Taipei logging 10 aircraft and Tokyo reporting two—one of which performed maneuvers off Taiwan's east coast.
Washington can be a very self-centered town.
Representatives of the two governments are scheduled to sign a document on Friday signaling their intent to cooperate further on maritime security in the face of China's growing gray-zone activities.
Admiral John Aquilino, Biden's choice to lead U.S. forces in the Indo-Pacific, told senators on Tuesday that combined allied forces in the Western Pacific would deter a Chinese attack against Taiwan.
Chiu Kuo-cheng, Taiwan's newly appointed defense minister, stressed the difference between China's capability to launch an attack and its ability to occupy the island nation of 23.5 people.
China has involved itself in all of Asia's biggest flashpoints because of Xi Jinping's strongman approach to his upcoming party leadership challenge next year, a Taiwanese lawmaker has told Newsweek.
The Taiwanese government is pleading with its citizens not to change their legal name for the sake of capitalizing on the two-day sushi deal ending Thursday.
By sailing through the contested waters, China's Taiwan Affairs Office spokesperson Zhu Fenglian said the U.S. "sent the wrong signals to the 'Taiwan independence' separatist forces, deliberately disrupting the regional situation and undermining the peace and stability of the Taiwan Strait."
Hsiao Bi-khim, Taiwan's de facto ambassador to Washington, said her country's continued survival was in the interest of stakeholders in the region, including the United States.
Arleigh Burke-class destroyer USS John Finn transited the narrow waters between China and Taiwan on Wednesday.
The chief of Taiwan's main opposition was correct in describing China as a threat, an analyst said, but the young chairman faces a leadership race from the party's Beijing-friendly "old guard."
A new report issued by Taiwan's defense ministry on Wednesday said the country's air force had adjusted the way it was responding to Chinese warplane incursions in order to account for fuel costs.