sentences:  By the time of the Hyksos invasions of Egypt, c. 1600 BC, horses were pulling chariots with an improved harness design that made use of a breast collar and breeching, which allowed a horse to move faster and pull more weight.The breastcollar style harness is still used today for pulling lightweight vehicles.Even after the chariot had become obsolete as a tool of war, there still was a need for technological innovations in pulling technologies as larger horses were needed to pull heavier loads of both supplies and weapons.