In Africa, a number of specialized occupations developed ,highly skilled metal smiths developed more effcient tool that increase agricultral produtivity. they also produce improved weapons ,which became important in the expansion of kingdoms.
Answer: The effect of WWI on the US economy was considerable. There are two effects that the war had on the US economy: short term, and long term. For the short term effect the US economy grew in the buildup to the war and during its prosecution. From 1915 the US made tons of loans to the UK to help them in their war effort.
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