No, it was not. The main reason the U.S. joined the war was to stop the spread of communism, however, they did not achieve that because the Communist North won. Furthermore, it caused tension within the country, and our beloved nationalism was not there. It caused outrage and many protests. The people of the U.S. became tired of the loss of people and many began to see our government as weak.<span />
The acquiring of the territories gave the United States justification to send out immigrants into those territories and settle the land along the trails created by traders and trappers beforehand. These immigrants and other workers then set up the Transcontinental Railroad to facilitate trade and transport back and forth from the west coast to the east.
The Columbian Exchange caused population growth in Europe by bringing new crops from the Americas and started Europe's economic shift towards capitalism
