Defeating the enemies, their empires and strongholds, thus making the horses one of the weapons of Islam, and the Muslims as their masters.
The Prophet (peace be upon him) had love and respect for horses and he had 22 in all during his lifetime.
Urwah al-Bariqi (may Allah be pleased with him) reported that the Prophet (peace be upon him) said,
"Great good is attached to the forelock of horses until the Day of Judgment by which both reward (in the Hereafter) and booty (in this world) are gained."(Bukhari)
"The best of horses is black with a white forehead and having a white upper lip, next to that a black horse with white forehead and white legs. If it is not black, then it is bay (reddish brown approaching chestnut) horse with these marks." (Tirmidhi)
Prophet Muhammad (peace be upon him) said,
"Don't cut short the forelocks of horses, nor of their tails, because the tails keep off the flies, and regarding manes, they keep them warm, and blessings are interwoven with the hairs of their forehead" (Abu Dawood)
"Everything with which a man plays is unlawful except his shooting with arrows, his training with his horse, his sporting with his wife, and verily these are of the truths." (Tirmidhi, Abu Dawood, Ibn Majah)
The Arabian Stallion
The existence of this magnificent horse goes back during the time of Prophet Ismael Bin Ibrahim in the Arabian desert...
Allah (Subhana Wa Ta'ala) created this horse from the 4 winds: spirit from the North, strength from the South, speed from the East, and intelligence from the West. While doing so, He exclaimed,
"I create thee, Oh Arabian. To the forelock, I bind Victory in battle. On thy back, I set a rich spoil and a Treasure in thy loins. I establish thee as one of the Glories of the Earth...I give thee flight without wings."
The Prophet (peace be upon him) said,
"A horse may be kept for one of three purposes; for a man it can be a source of reward, for another it may be a means of living, and third it may be a burden (a source of committing sin)."
"As for the one for whom it is a source of reward, he is the one who keeps his horse for the sake of Allah; he ties it with a long rope in a pasture or in a garden." (Volume 4, Book 56, Number 839, Bukhari)