Taipei fires howitzers and target flares as part of the military exercise in the island's southernmost county of Pingtung, says army.
Joseph Wu, speaking at a press conference in Taipei, offered no time-table for a possible invasion of Taiwan, which is claimed by China as its own.
Taipei's drills, taking place on Tuesday and Thursday, will include the deployment of hundreds of troops and about 40 howitzers, the army said.
China slams US House Speaker Nancy Pelosi's visit to island state as threat to peace in Taiwan Strait, responding with flurry of military exercises and announcing suspension of several agricultural imports from Taiwan.
There was no immediate comment from China, which has in the past said that such moves were drills aimed at protecting the country's sovereignty.
Beijing has been "surprised" by the poor performance of Russian military forces as well as the tough resistance coming from the entire Ukrainian society, CIA head Bill Burns says.
As tensions between China and Taiwan increase, a state-backed television station mistakenly claimed that China had attacked the territory and that "a war could break out."
Taiwan welcomed the decision saying the training and equipment would help defend itself against Beijing's "continuing military expansion and provocation".
US Defense Secretary Austin says Washington seeks no "new Cold War or a world divided into rigid blocs."
Chinese Foreign Ministry spokesperson Wang Wenbin reasserted China’s longstanding claim that the island is indivisible from the mainland at a daily briefing after Biden made his comment a day before.
President Biden made a bold remark, saying the US will defend Taiwan, a largely unrecognised country established by anti-communist Chinese dissidents, if ever China invaded it.
Taiwan defence ministry’s warning comes a week after China mounted four consecutive days of record air force incursions into the Taiwanese air defence zone.
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