All the saints are prepared for the marriage supper (Revelation 19:8) which 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).

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8