This way their sword was between them and anyone who was coming toward rhem in the opposite direction.they were ready to pull out their sword and fight to defend themselves with their right arm. But there is evidence that people used the right side,too.In 1300,some Say the pope Boniface ordered pilgrims on the way to St.Peter's Basilica to stay to the right when they crossed a nearby bridge.Another idea is that in the 1700,s,people in France and in the US started to use wagons with several pairs of horses and to drive on the right side of the road