What does Revelation 19:14 mean?

It was customary for Roman generals to celebrate their victories by leading a procession through Rome. The procession was called a "triumph." The victorious general, riding on a white horse, led the way, and was followed by his army. The last group in the procession was the captives who were chained and dragged by the general's soldiers. This verse tells us about the moment when the Captain of our salvation (Hebrews 2:10) leads His armies in a victory parade—the second coming of Christ.

All of the following members of the armies of heaven wear fine linen, white and pure. As His followers, redeemed believers are clothed in the garments of salvation and wear robes of righteousness. Isaiah 61:10 declares, "I will greatly rejoice in the LORD; my soul shall exult in my God, for he has clothed me with the garments of salvation; he has covered me with the robe of righteousness." They bear the righteousness of Christ (2 Corinthians 5:21). Further, Christ's followers ride white horses, symbolic of the victory they share with their Lord. Romans 8:37 affirms that "we are more than conquerors through him who loved us."