About the fourth century BC the Chinese devised a harness with a breast strap known as the trace harness, modified approximately one hundred later into the collar harness. Unlike the throat-and-girth harness used in the West, which choked a horse and reduced its efficiency (it took two horses to haul a half a ton), the collar harness allowed a single horse to haul a ton and a half. The trace harness arrived in Europe in the sixth century and made its way across Europe by the eighth century.

The horse collar was used to have a easier way for a horse to carry weight and for that it made them use less horses to pick up a big amount of weight because of how much support the horse collar gave.

It made transporting some heavy loads easier back then. Even now some people may use it to hold there loads to get groceries or even crops for farms. Crops would be healthier and farmers can get more crops because it would be easier to carry them.But mainly o help the load of the object be more supportive for a horse to carry. It has affected a lot because you never know that If some one who invented something very useful to carry large load. They could have learned from this idea though made it better. But it could even have made something very useful we use today come from the Chinese invention the horse collar.