The 4 horses of the Book of Revelation correspond to the first 4 seals opened by our Lord Jesus. Then the 5th seal corresponds to the persecution of the saints that will be killed for the Word of God & for their testimony during this time:
Are we Christians suppose to work to have unity with others?
This seems to be a recurrent topic among many believers & the world in general, to pursue or work for unity. Many Christian leaders even propose to sacrifice the Truth of the Scriptures in order to have unity with men that worship different gods, or approve sinful behavior, not understanding they are departing from the faith in Christ. The Lord Jesus Christ created a UNITY that we believers are instructed to keep/guard.