Following the U.S. decision this month to back membership in the North Atlantic Treaty Organization for Montenegro, the head of the alliance and its council of ambassadors will travel to the country next month for meetings on the country’s bid.

Some NATO members believe inviting Montenegro could be a way to counter Russian aggression in the region, showing that the door to alliance membership remains open. The alliance is set to make a decision on whether to invite Montenegro, a small country in the Balkans, to join in December.

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