By 5000 B.C., Mesopotamian, Turkestan, and Chinese farmers had begun to domesticate various animals, including the ox, camel, horse, and yak. [1] The long struggle to substitute oxen for men has ultimately led to the liberation of man power for more valuable tasks in society. [2] Oxen were used for burden bearing in ancient times alongside other domesticated animals that have since disappeared. [3]
See also: UB 61:3.5.