How did armies such as the Mongols keep their archers supplied with arrows while on campaign?

Metallurgy was practiced by our ancestors for thousands of years. During the Hunnu (xiongnu) empire, metalworking was well established and commonly practiced. Blacksmiths made astonishing works of art from metal, gold and silver. The composite bows and various types of arrows have been used extensively by the Hunnus. The arrowheads…