The Bronze Age lasted from around 2300 BC to 700 BC. During this time, bronze was widely used to make tools, weapons, and other implements as it was harder than previously used stone. Bronze is an alloy of copper and tin. Cities without natural resources to obtain bronze were forced to trade with those that did have resources. The development of bronze tools and weapons advanced societies politically, economically, socially, and culturally. One influential Bronze Age invention was the chariot, a light two-wheeled vehicle drawn by horses that was used for transportation, hunting, and as a powerful military weapon.