The Baltic States and Poland have long wanted an enduring NATO presence on their territories. Russia’s invasion and annexation of Crimea in 2014 convinced their allies they need it. With plans approved at the Warsaw Summit in 2016, now the four countries each have a battle group of approximately 1,000 troops stationed on their territory. “We don’t see any imminent threat against any NATO ally,” NATO Secretary General Jens Stoltenberg said, “but we have to be vigilant.”

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