 There is some evidence that about 3,000 BC, near the Dnieper River and the Don River, people were using bits on horses, as a stallion that was buried there shows teeth wear consistent with using a bit.However, the most unequivocal early archaeological evidence of equines put to working use was of horses being driven.Chariot burials about 2500 BC present the most direct hard evidence of horses used as working animals.