Alexander The Great (student of Aristotle) used the famous iodine-clock reaction to coordinate his troops in battle, thus giving him an advantage over his opponents. Each head of a group would meet with Alexander and all would dip strips of cloth into the iodine solution at the same time. Then they would tie these around their spears. The bands of cloth around the spears were known as Alexander's rag time-bands.
LOL, perfect for a Friday PM.