'Horseman' in the Bible

I looked, and there was a white horse. The horseman on it had a bow; a crown was given to him, and he went out as a victor to conquer.

Then another horse went out, a fiery red one, and its horseman was empowered to take peace from the earth, so that people would slaughter one another. And a large sword was given to him.

When He opened the third seal, I heard the third living creature say, “Come!” And I looked, and there was a black horse. The horseman on it had a set of scales in his hand.

And I looked, and there was a pale green horse. The horseman on it was named Death, and Hades was following after him. Authority was given to them over a fourth of the earth, to kill by the sword, by famine, by plague, and by the wild animals of the earth.