'Battle' in the Bible

In fact, if the trumpet makes an unclear sound, who will prepare for battle?

For our battle is not against flesh and blood, but against the rulers, against the authorities, against the world powers of this darkness, against the spiritual forces of evil in the heavens.

Timothy, my son, I am giving you this instruction in keeping with the prophecies previously made about you, so that by them you may strongly engage in battle,

quenched the raging of fire, escaped the edge of the sword, gained strength after being weak, became mighty in battle, and put foreign armies to flight.

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.