What is America's impact on joining the war?

The impact of the United States joining the war was significant. The additional firepower, resources, and soldiers of the U.S. helped to tip the balance of the war in favor of the Allies. When war broke out in 1914, the United States had a policy of neutrality.

couples could only have one child to reduce the population growth.

health and medicine because people are dying from not being healthy or not strong enough medicine