Answer:
Slavery played an important role to create tension between north and south state of america and leads this tension to civil war.
Explanation:
In 1861, tensions between northern and southern states creates on the issues of slavery, states' rights and westward expansion. Due to these reasons, civil war occurs but the main cause of civil war was the slavery. The northern state was against of slavery while the southern states of america was in favor of slavery. Due to difference in the concepts and ideology, tension creates which leads to civil war.
I believe meritocracy is the system you’re looking for.
Ex. Civil Service Exam
The U.S. army in Europe was under the command of General John J. Pershing. At first, the U.S. had few trained troops to send over to Europe. However, the army was quickly built up through the draft and volunteers. By the end of the war around 2 million U.S. troops were in France. American troops on way to the front march thru London Source: Department of Defense The U.S. troops arrived just in time to turn the tide of the war in favor of the Allies. Both sides were exhausted and running out of soldiers. The influx of fresh troops helped to boost the morale of the Allies and played a major role in the defeat of the Germans.
