According to the Organization for Security and Co-operation in Europe's (OSCE) 2011 Vienna Document, a nation must allow other states to observe its military drill if more than 13,000 troops are involved. Russia has said only 12,700 troops will take part. However, western security analysts have pegged the number as high as 100,000.

Russia's Zapad-2017 war games explained Russia denies alterior motives Russia has denied NATO's allegations that Zapad-2017 will mobilize troops in violation of international agreements; it insists it is being fully transparent in its preparations and operations. Russia's Deputy Defense Minister Alexander Fomin (above) told DW that Zapad-2017 "is absolutely peaceful, and absolutely defensive in nature." He also denied that the practice maneuver was directed at NATO.

Russia's Zapad-2017 war games explained 'NATO remains calm and vigilant' WhileNATO Secretary General Jens Stoltenberg has welcomed Russia's troop disclosure, he also has said that the Western military alliance with roots in the Cold War has "every reason to believe it may be substantially more troops participating than the official reported numbers" based on previous drills. "NATO remains calm and vigilant," he said in early September while in Estonia (above).

Russia's Zapad-2017 war games explained Germany fears 'over 100,000' troops German Defense Minister Ursula von der Leyen also claimed Russia will deploy "over 100,000" troops in the Zapad-2017 games. In January, Germany sent around 450 troops to Lithuania as part of a NATO mission. Lithuania, a former Soviet republic, is also uneasy about the Russian war games. Above (right), von der Leyen inspects the deployed German troops with Lithuanian