A European map from the 18th century recognizes Dokdo Island as Korean territory.
"Russia's own troops are not enough" to push Ukraine out of the Russian border region, Kyiv's top commander has said.
Pyongyang's troops have already been fired open in Russia's Kursk region, according to a Ukrainian military official.
The air force plane, capable of transporting nearly 200 passengers, took off again after less than an hour in Pyongyang.