There were many things that led to World War I, such as migration, imperialism, disease and sickness, labor. It impacted the U.S in many ways such as other countries joining together to go against the United States. Many countries wanted and needed help from the United States. The U.S went into war because many countries started pointless and unnecessary fights that led to this war.
For example, migration had a big impact on the war. Everyone in the southwest United States began moving west and midwest. Everyone in the south central area began moving midwest. Everyone in the southeast began moving northeast. Imperialism also affected the war, it was a policy of extending a country's power and influence through diplomacy or military force.
For example, migration had a big impact on the war. Everyone in the southwest United States began moving west and midwest. Everyone in the south central area began moving midwest. Everyone in the southeast began moving northeast. Imperialism also affected the war, it was a policy of extending a country's power and influence through diplomacy or military force.