Nato has declared plans to enormously increase the number of its forces at high rate to over 300,000 troops.
The bloc’s rapid reaction force currently has over 40,000 troops at its disposal, with many of those based along the alliance’s eastern flank.
Secretary-General Jens Stoltenberg said the increase followed a direct threat from Russia to European security.
He added that “the new military blueprint” would “drastically upgrade” the bloc’s eastern defences.
“At the summit, we will strengthen our forward defences,” the bloc’s civilian leader said at a news conference in Brussels.