'Assemble' in the Bible

For they are the spirits of demons working marvels--spirits that go out to control the kings of the whole earth, to assemble them for the battle which is to take place on the great day of God, the Ruler of all.

And assemble them they did at the place called in Hebrew 'Har-Magedon.'

and will go out to lead astray the nations in all the four corners of the earth, Gog and Magog, and assemble them for war, and they are like the sands on the seashore in number.