New Defender's Study Bible Notes
19:14 armies which were in heaven. All the saints are prepared for the marriage supper (Revelation 19:8) but it will be held on earth, so the earth must first be purged. Therefore, they will follow the Rider to the battle, but they will not be involved in the battle, for He has the only weapons needed (Revelation 19:21).
19:14 followed him upon white horses. Note Zechariah 14:5; I Thessalonians 3:13; Jude 14. His saints will accompany Christ both at the rapture (I Thessalonians 4:14) and at His glorious appearing on the earth, as described here.