The four horsemen rode on different color horses. The first horsemen rode on a white horse with a bow in his hand and he symbolized conquest. The second horsemen rode on a red horse with a sword in his hand and he symbolized war. The third horsemen rode on a black horse with a set of balances in his hand and he symbolized famine. The fourth horsemen rode on a pale horse with a pitchfork in his hand and he symbolized death.
Revelation, chapter 6, spoke about the four horsemen. They appeared