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55 million years ago, in the Eocene, the first horses emerged, and in the Miocene many genera and species existed, which disappeared in the Pliocene.

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Only the genus Equus remained. The genus was widely spread in the Pleistocene, until the horse became extinct in America.

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The War of the Heavenly Horses, general Li Guangli forces the city of Da Yuan (Alexandria Eschate) into tributary status.

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Philip II of Macedon wins the chariot race at the Olympic Games and retains the crown in 348 BCE.

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The Roman cavalry expanded to include riders that could pay for their own horse.

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The tethrippon (4 horse chariot race) was added to the Olympic games

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Domesticated horses introduced in Mesopotamia and First use of war chariots in Mesopotamia.

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Horses were first domesticated and probably on the steppes of southern Russia and Kazakhstan, and introduced to the ancient Near East. Before this time, people used donkeys as draught animals and beasts of burden

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Horses were first domesticated 6000 years ago in the western part of the Eurasian Steppe, modern-day Ukraine and West Kazakhstan.

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Horses are mostly used for riding and transportation. The most common use in the western world is for pleasure riding and horse sports such as racing, jumping, and showing.