I believe that the four horsemen in Revelations refers to the rise of Islam and the first four leaders that make up the Umayyad Caliphate
Mohammed is also a direct descendant of Ishmael, the firstborn son of Abraham. So what do know about Ishmael? Lets see what the Bible says.
And he will be a wild man; his hand will be against every man, and every man's hand against him; and he shall dwell in the presence of all his brethren.
And God was with the lad; and he grew, and dwelt in the wilderness, and became an archer.
Since the he was wearing a crown, we know that he was an important figure and he did go forth and conquer.
Mohammed is the first horseman
And I saw, and behold a white horse: and he that sat on him had a bow; and a crown was given unto him: and he went forth conquering, and to conquer.
Another interesting fact is that if you search the word Baal, the idol they worshipped back in the day, in Strong's Dictionary the number is H1167 you get the following:
H1167 בַּעַל ba`al (bah'-al) n-m.
- a master.
- (hence) a husband.
- (figuratively) owner (often used with another noun in modifications of this latter sense).
KJV: + archer, + babbler, + bird, captain, chief man, + confederate, + have to do, + dreamer, those to whom it is due, + furious, those that are given to it, great, + hairy, he that hath it, have, + horseman, husband, lord, man, +married, master, person, + sworn, they of.
Abu Bakr is the second Horseman
And there went out another horse [that was] red: and [power] was given to him that sat thereon to take peace from the earth, and that they should kill one another: and there was given unto him a great sword.
He crushed the rebellion of the Arab tribes throughout the Arabian Peninsula in the successful Ridda Wars. Though the period of his caliphate covered only 27 months, it included successful invasions of the two most powerful empires of the time: the Sassanid Persian Empire and Byzantine Eastern Roman Empire.
Umar is the third Horsemen
And when he had opened the third seal, I heard the third beast say, Come and see. And I beheld, and lo a black horse; and he that sat on him had a pair of balances in his hand.
And I heard a voice in the midst of the four beasts say, A measure of wheat for a penny, and three measures of barley for a penny; and [see] thou hurt not the oil and the wine.
Among the many things Umar did was impose a new tax system. Umar - "The King will do as he pleases" in Daniel 11:36-45. Daniel was taken captive in 605 BC as part of the Babylonian captivity of Israel. Daniel finished his work around the year 530 BC, shortly after the capture of Babylon by Cyrus of Persia in 539 BC. In the book of Daniel (Daniel 11:36-45 and 7:23-25) he sees a future king who treats the Holy People very badly. This King defeats three kings and changes the set times and laws. In all, Umar fulfilled 31 prophecies of Daniel. This king has many battlefield conquests and invades the Holy Land. Today many people think this king is still in the future (perhaps the “Antichrist”), but almost certainly Daniel was writing about the second Muslim caliph after Mohammad named Umar. Daniel wrote this 1,200 years before Umar. Umar was murdered in a mosque in Media, and no one came to help him.
Uthman is the fourth Horsemen. Revelation tells us the fourth rider is on a pale green horse
And I looked, and behold a pale horse: and his name that sat on him was Death, and Hell followed with him. And power was given unto them over the fourth part of the earth, to kill with sword, and with hunger, and with death, and with the beasts of the earth.
Uthman is critically important in Islamic history because after his death marked the beginning of open massive religious and civil war conflicts within the Islamic community (called the “Fitnah”). Uthman was also murdered by other Muslims. Following his death, Ali was chosen as the fourth caliph, but not before violent conflict broke out. War erupted when Ali became caliph, and he too was killed in fighting in the year 661 near the town of Kufa, now in present-day Iraq.
Revelation tells us the Four Horsemen will have power over one-quarter of the world. (Revelation 6:8 "They were given power over a fourth of the earth to kill by sword, famine and plague, and by the wild beasts of the earth.") The Four Horsemen set in motion the Umayyad Caliphate.
At its greatest extent, the Umayyad Caliphate (661-750) covered 15 million square kilometers (5.8 million square miles) and had power over 62 million people (estimated between 25% to 29% of the world’s population at that time), making it the one of the largest empires in history in both area and
proportion of the world’s population. Today about 28% of the world is Islamic. The "Rightly Guided Caliphs" is a term used in Sunni Islam to refer to the 30-year reign of the first four caliphs (successors) following the death of the Islamic prophet Mohammad, namely: Abu Bakr, Umar, Uthman, and Ali.
The Bible says the colors of the Four Horsemen are 1) white, 2) red and 3) black, these colors are the colors of Islam. Many translations give the fourth color as "pale". The correct translation is green, or pale green. The Greek word in Revelation 6:8 for the fourth color is chlóros: or pale green.