Why do some countries drive on the right side and others drive on the left side? Well, once upon a time everyone drove their horse & buggies on the left, everywhere. Except the Pope. He drove on the right. The Pope and Emperor Napoleon Bonaparte (French/Corsican: AUG 1769-May 1821) got into a disagreement at one point so Napoleon promptly ordered everyone to switch from left to right on the Continent of Europe, just to show everyone who’s boss.
Most all peoples have always traveled on the left since ancient times because most people are right-handed. Traveling on the left kept the right arm free to greet passersby or to draw ones sword in defense.
Want to know more about Right-side, Left-side? – click.