The Taiwanese military will simulate a war scenario in which its units have completely lost contact with their central command and have to operate on their own.
Lacking sufficient anti-aircraft systems to repel Russia's attacks, Ukraine is pushing its European allies to establish a no-fly zone in the country's west by deploying air defense systems in Poland and Romania.
Japan and the Philippines will hold high-level defense talks next month, Manila said, as the two countries seek to boost ties in the face of an increasingly confrontational China.
Yemen's Iran-backed Houthi rebels claimed an attack targeting a merchant ship in the Red Sea, which two British maritime security agencies said caused no casualties.
Russia has sent around 10,000 naturalized citizens to fight in Ukraine, a top official said, adding that some had chosen to leave the country rather than face being enlisted.