Revelation 19 finishes with a description of a war but one that is for all practical purposes a done deal before it even starts.
The first thing that is sent is an angel that has a message to all the birds of carrion to come to the battle site to eat the flesh of the enemies of God. Mind you, the battle has not been fought yet but the message is being sent. This is called the Great Supper of God. Good thing only the birds are participating, because it is a blood and gore feast.
The Beast and False Prophet have gathered together all the kings of the earth and their armies to make war with Christ and his army. It is starting to cause me to wonder who or what the beast and false prophet really are.
The battle is more of a slaughter. The Beast and False prophet are both seized and destroyed in the Lake of Fire. Everyone else is killed by Christ. All the birds are filled with their flesh. In short all evil, save one being, is removed at this point and Christ has complete control of earth.
The truth is, if someone was looking to make an epic battle scene from this part of Scripture they would be hard pressed. The picture is the bad guys are completely destroyed while the good guys lose not a single person.
Next: Satan Bound