Who can do a short writing about the important achievements and contribution of ancient Indian civilization

Native americans helped europeans by showing them ways to work the land agriculturally, hunting wise, and also provided a greater knowledge of the land in general. During infamous wars such as the war of 1812 European factions even used natives to fight in their armies because of their guerilla warfare tactics, and extensive knowledge.

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porter is writing economic history because he is focusing on the cost of developing vaccines.