Answer:
What costly mistake did the Confederate make before the Battle of Antietam? They divided their army. The Union army also found Lee's battle plan at an abandoned Confederate camp.
Explanation:
The Ice Age had a great effect on where people settled in americans since they were only able to reach North America through the Bering Land Bridge, which was only frozen due to the extremely low temperatures. Without this they would have had no way to leave Siberia.
The United Nations was formed to ensure that an event like WWII would never happen again.
