Later in Rev.12, we are shown the devil once he is cast down to this earth, goes after the symbolic 'woman' of that chapter, i.e., those who keep God's commandments and have the testimony of Jesus Christ.
Rev 12:15
15 And the serpent cast out of his mouth water as a flood after the woman, that he might cause her to be carried away of the flood.
KJV
That flood out of the serpent's MOUTH is that same symbolic working in the Rev.9 chapter with what comes out of the mouths of the locusts. They represent lies of deception.
The events of Rev.9 through Rev.11:14 are about the last three trumpet-woe periods. The 6th trumpet - 2nd woe period flows from Rev.9:13 to Rev.11:14. The Revelation 11 chapter within the 6th trumpet - 2nd woe period shows a temple on earth with those who are worshiping inside, and the outer courts tread upon by the Gentiles, and then will all the world rejoicing and giving each other gifts once the beast that ascends out of the bottomless pit kills God's two witnesses there in Jerusalem that sent given witness against it. Thus the majority of the whole world are deceived by the false one setup in Jerusalem in that time of the 6th trumpet - 2nd woe. That is the time of "great tribulation".
Rev 12:15
15 And the serpent cast out of his mouth water as a flood after the woman, that he might cause her to be carried away of the flood.
KJV
That flood out of the serpent's MOUTH is that same symbolic working in the Rev.9 chapter with what comes out of the mouths of the locusts. They represent lies of deception.
The events of Rev.9 through Rev.11:14 are about the last three trumpet-woe periods. The 6th trumpet - 2nd woe period flows from Rev.9:13 to Rev.11:14. The Revelation 11 chapter within the 6th trumpet - 2nd woe period shows a temple on earth with those who are worshiping inside, and the outer courts tread upon by the Gentiles, and then will all the world rejoicing and giving each other gifts once the beast that ascends out of the bottomless pit kills God's two witnesses there in Jerusalem that sent given witness against it. Thus the majority of the whole world are deceived by the false one setup in Jerusalem in that time of the 6th trumpet - 2nd woe. That is the time of "great tribulation".