How many Horsemen of the apocalypse were sent to Earth?

Answer 1

The Four Horsemen of the Apocalypse are described in the last book of the New Testament of the Bible, called the Book of Revelation of Saint John the Evangelist at 6:1-8 KAYLIE WAS HERE!!! <3. The chapter tells of a scroll in God's right hand that is sealed with seven seals. Jesus Christ opens the first four of the seven seals, which summons forth the four beasts that ride on white, red, black, and pale-green horses symbolizing conquest, war, famine, and death, respectively. The Christian apocalyptic vision is that the four horsemen are to set a divine apocalypse upon the world as harbingers of the Last Judgment.

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http://en.wikipedia.org/wiki/Four_Horsemen_of_the_Apocalypse