How did world war 1 change the balance of economic power in the world?

WW1 was the first trench war that lasted a long time but it changed the world a lot in the oil shovel and others such as a high demand of a machine to dig tunnels and trenches but could also with stand the mud and water (but was never made) but it changed the economy with the high demand of recourse's

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d)to gain support for the independence movement.

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