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What impact did U.S. entry into World War I have on labor and production? Farming and agriculture fell short of meeting the food requirements of the military. There was a serious labor shortage that was difficult to fill. The civilian population was unable to keep up with the supply needs of the military. With men drafted to serve in the military, jobs opened for women and minorities.

Sagot :

The impact that U.S entry into World War I have on labor and protection is that  Farming and agriculture fell short of meeting the food requirements of the military. 
Sholanejoid

Answer: With men drafted to serve in the military, jobs opened for women and minorities

Explanation: During WWI (1914-1918) so many women were employed into jobs that had either been vacated by men who had gone to war, or had been created as part of the war effort.

The demand for weapons and the overall wartime situation resulted in ammunitions factories collectively becoming the largest employer of American women by 1918.