17:14"These will wage war against the Lamb, and the Lamb will overcome them, because He is Lord of lords and King of kings, and those who are with Him are the called and chosen and faithful."

"These will WAGE WAR AGAINST THE LAMB,

This is just a statement of what actually happens in Revelation 19. This is a spiritual WAR and fulfills the prophesy given in Zechariah 14:1-2.

and the LAMB WILL OVERCOME THEM,

This fulfills the continuation of the prophesy in Zechariah 14:3-8. The details of how this will be accomplished are given in Revelation 19:11-21.

Recall that the sword comes from Jesus mouth (Revelation 1:16) which means this WAR is a war of words of TRUTH (John 14:1-11). The words will be spoken by One who has AUTHORITY (versus physical control of the earth; although the Lamb has that also). It is the same AUTHORITY

because HE is LORD of lords and KING of kings,

This is confirmed in Revelation 19:16. Apparently these titles were commonly used among the New Testament believers (1 Timothy 6:11-15-16). In the Old Testament, the title was "God of gods" (Deuteronomy 10:17).

and those who are with Him are the

Those who are with Him are not spectators but active combatants (see Matthew 10:24-33; Jude 1:14; Daniel 7:9-10-11; and Zechariah 14:5).

Attribute:
Related spiritually to:
CALLED (2 Timothy 1:9 and 1 Peter 2:4-10) and
SALVATION (Romans 1:1-6-7)
CHOSEN (Ephesians 1:3-4-14; Colossians 3:12-17; Matthew 22:1-14; 1 Peter 2:4-6-10; and Psalm 89:19-37) and
SERVICE
FAITHFUL." (Matthew 25:14-30 and 1 John 5:1-4-5)
STEWARDSHIP or Endurance (Revelation 22:11 and Revelation 2:8-10)