In response to reunification of Crimea with Russia, viewed by NATO as illegitimate despite the referendum that took place on the peninsula, the military bloc increased its presence in Eastern Europe along with air, naval patrols and troops on exercises.
"This presence is rotational and well below any reasonable definition of substantial combat forces," Lungescu said.
The nearly year-long conflict in southeast Ukraine has served as a justification for NATO expansion in Eastern Europe. The military bloc, along with its political and economic counterparts, claims Moscow is involved in the ongoing fighting. Russia has repeatedly denied its involvement in confrontation between Kiev and Donbass.