North Korean troop deployment to Russia was an initiative from Pyongyang, not the Kremlin. However, Russian President Vladimir Putin quickly endorsed it, according to The New York Times. The agency notes that when North Korean troops began arriving in Russia this fall,

Secretive North Korea has one of the world’s largest militaries, with 1.28 million active soldiers, but unlike in Russia, the Korean People's Army (KPA) has no recent experience of combat. Pyongyang’s army is “thoroughly indoctrinated but with low readiness,” says Mark Cancian, from the Centre for Strategic and International Studies (CSIS).