In 1863, the nature of Civil War shifted. On a January 1st of that year, President Lincoln issued the Emancipation Proclamation, freeing slaves in the Confederate states... With the Emancipation Proclamation, the struggle between North and South transformed into a war to end slavery.
C. Pete Seeger didn't actually try to attempt to cut it but he said if he had an axe he would've cut the cables
Answer:
The answer would be nationalism.
Explanation:
They have different ecomimic values due to their differences in place and times. As well as being different nationalites, they are going to be different socially too. Considering they may have different languages, it would affect the way people from the north would socialize to people in the south. The USA and China have different political reasons and presidents so of course this would be the same wiht the North and South.
A widespread disease that killed many people
the split of the Christian church
invasion from Arab Muslims