Here is a summary of the Four Horsemen of the Apocalypse from the Book of Revelation:
The Four Horsemen of the Apocalypse are described in the Bible's Book of Revelation, chapter 6. They appear when the Lamb (Jesus Christ) breaks the first four of the seven seals that seal a scroll held in God's right hand. Each horseman rides a different colored horse and symbolizes a different catastrophe that will occur at the end times before the second coming of Christ.
The First Horseman rides a white horse, carries a bow, and wears a crown. He is a conqueror bent on conquest. This horseman is thought to represent the Antichrist and a period of false peace before major tribulations occur. The white color symbolizes false righteousness and deception.
The Second Horseman rides a red horse and is given a great sword. His ride signifies terrible warfare and bloodshed as nations and kingdoms rise against each other. Red is the color of blood and violence.
The Third Horseman rides a black horse and carries a pair of scales in his hand. The scales represent economic disaster, famine, and major food shortages. Black is the color of mourning and famine. A voice states that a measure of wheat will cost a daily wage, showing hyperinflation and the end of prosperity.
The Fourth Horseman named Death rides a pale horse. Hades and Hell follow him, and he is given authority over a fourth of the earth. His ride signals death by sword, famine, pestilence, and wild beasts. The pale color indicates the pallor of death. Hell follows to swallow up the dead.
These four horsemen will bring destruction on an apocalyptic scale. But they are part of God's plan and allow the righteous to earn places in heaven. After the first four seals are broken, there are still three more seals to open, indicating worse events ahead.
The Fifth Seal reveals martyrs killed for their faith and their impatience for God's justice. The Sixth Seal brings a devastating earthquake and various celestial and terrestrial disturbances. The Seventh Seal cues seven trumpet blasts that unleash even more catastrophes on the earth.
The trumpets include: hail and fire that destroy vegetation, a flaming mountain crashing into the sea, a star called Wormwood falling and poisoning fresh water, the sun and moon darkening, locust-like creatures torturing humanity, four angels unleashing an army of 200 million to slaughter a third of mankind, and voices from heaven proclaiming that the end is come.
With the seventh trumpet, seven angels are given bowls of God's wrath to pour out on the inhabitants of the earth. The bowls unleash plagues and destruction similar to those inflicted on Egypt before the Exodus. These include: painful sores, the sea turning to blood killing all marine life, all fresh water turning to blood, the sun scorching people, darkness and pain, the drying up of the Euphrates river to prepare for invading armies, and a devastating earthquake leveling cities and mountains.
Through these successive waves of catastrophe, God punishes the wicked and unbelieving on earth and prepares the way for the defeat of Satan and his armies by Jesus Christ Himself. After a final battle at Armageddon, Christ will establish his millennial kingdom on earth with the righteous survivors. But even after 1000 years of peace, Satan will be unleashed again for a final confrontation before he is defeated once and for all and thrown into the Lake of Fire.
The Four Horsemen, and the seals, trumpets, and bowls that follow them, represent the outpouring of God's wrath on the earthly realm. For believers, they symbolize the hope of salvation amid the coming horrors. For nonbelievers, they foretell a progression of catastrophes worse than any the world has known, leading up to the final judgment. Their rides mark the End of Days when Christ will vanquish evil and reign in glory with the faithful forever.