Answer:
They have a similar ancestor I think
Hope this helps :)
There were actually four HUGE causes for WW1, treaties and alliances brought many countries into war, the imperialism of some countries scared other countries, and they were "defending" themselves, there was a lot of weapons stocking, and countries were creating gigantic armies, and that threatened other countries, and then we have plain old nationalism.
Answer:
Democrat and communist parties fighting for power.
So i imagine you mean the people that got free form the emancipation proclamation. What the emancipation did was say it was illegal for people to own any slaves. Former slaves didn't fully get to have equal rights until the 1900's. So in summary all it did was make it illegal to own slaves and the Confederacy of America had to accept that when trying to join back up with he The United States