What was the significance of the CW?

Northern victory in the war preserved the United States as one nation and ended the institution of slavery that had divided the country from its beginning. But these achievements came at the cost of 625,000 lives--nearly as many American soldiers as died in all the other wars in which this country has fought combined.

Explanation:

a peace conference held after the surrender of japan

an international conference held near the end of world war ii

a meeting of the victorious nations after the defeat of germany

a summit meeting between the united states and the soviet union