'Battle' in the Bible

The appearance of the locusts was like horses equipped for battle. Something like gold crowns was on their heads; their faces were like men’s faces;

they had chests like iron breastplates; the sound of their wings was like the sound of chariots with many horses rushing into battle;

For they are spirits of demons performing signs, who travel to the kings of the whole world to assemble them for the battle of the great day of God, the Almighty.

and will go out to deceive the nations at the four corners of the earth, Gog and Magog, to gather them for battle. Their number is like the sand of the sea.