The following section is from my good friend David Nikao’s website.
1st Seal – The white horse represents the conquering Roman Empire, from 96 – 180 A.D., as it was a time of its greatest expansion and their military conquests were celebrated by riding white horses in their victory parades. Cretan Roman Emperors Trajan, Hadrian, Antoninus Pius and Marcus Aurelius, each had a bow as their symbol. The crown represents the laurel wreathes of victory that were worn by the Caesars after their armies had won a military battle.
2nd Seal – The Red horse represents a bloody time in the Roman Empire from 185-284 A.D., as it went into a phase of revolution and civil war for 90 years, during which there were 32 emperors and 27 contenders for the throne.
3rd Seal – The Black horse represents a period gloom and despair, as the Romans suffered under excessive taxes that were needed to pay for wars. The prices for wheat and barley that the Lord decreed were the exact prices from 222-235 A.D.
4th Seal – The Pale horse represents 1/4th of Romans dying from famine, plague, pestilence and violence, from 250-300 A.D. The word ‘earth‘ means land, not the whole Earth. The Roman Empire is the land/earth of prophecy.
5th Seal – It represents the millions of martyrs who were killed by the Roman Empire, especially the Smyrna church martyrs who Emperor Diocletian persecuted for 10 years, from 303-312 A.D. Their blood is crying out for the Lord to avenge their deaths.
6th Seal – Earthquakes in the prophecy represent great political upheavals. Eastern Emperor Constantine defeated Diocletian’s army in 312 A.D., which ended the persecutions. Diocletian (the Sun) was so panic stricken, he died insane. Constantine defeated emperors Maxentius and Licinius to become sole ruler of both west and east by 324 A.D. The Roman leaders (stars) fell and their power receded as a scroll. The mountains and islands that were moved out of place, were the countries and people that were affected by this political change.
7th Seal – It represents the Lord sealing His servants before He sounds the 7 trumpets of judgment against the Pagan Roman Empire.