Tactical and special exercises involving tanks and artillery units took place on Sunday in Kherson, just north of Crimea.
Amid tensions with Russia, the Ukrainian military is on alert for a potential attack.
As part of the exercises, units were specially trained to reach remote areas.
“One of the objectives was to enter the hard-to-reach territories. To be able to act quickly and precisely to deploy the equipment to these territories,” said Sergei Nyev, commander of the Joint Forces of Ukraine.
The training also involved engineering units that perform tasks to set up minefields.
The buildup of around 100,000 Russian troops near Ukraine has fueled Western concerns about a possible offensive.
International efforts to defuse the standoff intensified on Monday, with French President Emmanuel Macron holding talks in Moscow and German Chancellor Olaf Scholz in Washington to coordinate policies as fears of a Russian invasion mounted.
White House national security adviser Jake Sullivan warned on Sunday that Russia could invade Ukraine “any day”, sparking a conflict that would have “enormous human cost”.
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