The discovery of iron in the empire of Ghana changed the course of its history in more than one way. First of all, the discovery of iron allowed many farming tools to be further developed, such as plows, hoes, and many more. This meant larger surpluses of edible food for humans, and feed for livestock. WIth more food for the livestock, the amount of livestock themselves began to grow in numbers. With bigger herds and more food, the empire began to expand. Herders were able to trade their livestock for valuable salt and gold, and some of their crops as well. The trade also helped Ghana expand.

Another use for iron was for weapons. Spears and swords were made superiorly to the wood, stone, or bone ones of other tribes. Ghana began to develop a military and began to conquer its neighboring tribes of Africa.

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