NATO has approved the deployment of four new battle groups in the eastern countries of the alliance, including Bulgaria, Hungary, Romania and Slovakia. Eight NATO battle groups will be deployed along the eastern flank, from the Baltic Sea to the Black Sea. Meanwhile, NATO's secretary general Jens Stoltenberg said that the alliance's top military commander has activated NATO's chemical, biological, radiological and nuclear defenses, and allies are deploying more. Will NATO's buildup of forces in its eastern member states affect the conflict in Ukraine? What consequences might there be?