From the early Church Fathers to now.
“And I saw the beast, and the kings of the earth, and their armies gathered together to make war with him that sat upon the horse, and with his army.”
“It speaks of the armies allied with the devil in the plural, because of the many forms of their sin and their divisions and various opinions. [By contrast], it speaks of the angelic powers and of those persons like the angels who follow Christ in the singular as an army, because of the unity of their mind and their will which is well-pleasing to the divine Word.”
“And I saw the beast, and the kings of the earth ... to make war, etc. He explains how that supper of God is prepared, namely by the devil attacking the Church but being defeated.”
“If you compare the words of the blessed Daniel, you will find one and the same thing. "He will come with a great multitude so that he might exterminate and destroy many." However, in the Revelation it is said that, when the kings of the earth and their armies are gathered together, they will war against him who sits on the horse, that is, against Jesus Christ, and against his army, that is, against all saints who follow him.”
“The war with the Lord and the divine angels was waged by both the Devil and the Antichrist, for he calls him a false prophet of the beastly Devil, and kings who band together with them; but they were defeated sooner than speech. What do the divine Scriptures say about them? Isaiah says, "Let the impious be taken away, so that he may not see the glory of the Lord," (Isa. 26:10) the sudden annihilation; but the apostle, "whom the Lord will consume by the breath of his mouth." (2 Thess. 2:8) What is swifter than to breathe upon and blow the enemies away?”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.