The conscription law during world war i differed from the civil war draft especially because it

had no provision for hiring a substitute or purchasing an exemption.

Explanation:

During the American Civil War, conscription could be escaped by hiring a substitute or purchasing an exemption. There was a conscription law that allowed individuals who were subjected to conscription could hire a substitute so that the person could be exempted from service. However, this provision of substitution was abolished by the Congress on 1863. This provision was criticized since the rich and wealthy men could easily buy their way out of the conscription. By the time of World War I, conscription became mandatory and all abled men between the ages of 21 and 30 should draft themselves into the army without exemption.