David,
We had a retirement ceremony at my farm last night for my best friend, a Marine LtCol...Cobra pilot, test pilot and one of the greats.
He and his wife are horse people...they have a ranch in Ridgecrest, CA and in Kennedy Meadows, up Nine Mile Road.
The picture below is one of the gifts we gave...it is a horse harness for working horses. I don't know if I'm going to get this right, but the presenter, another retired Marine, explained that this harness is for the trace horse, the horse closest to the wagon, the horse that pulls the load.
He turned to my friend and remarked, "You have always pulled the load."
Not a dry eye in the crowd.