The way that scientist determine when an era begins and when it ends is : Mass extinction of an organism
For example, millions years ago, the world was under the era of dinosaurs, which were simply the most superior beings on earth during that time, after they became extinct, the earth enter the era of the mammals
Answer:
How did they know who was Jewish?
■ How did Jews fight back?
■ Who were the Nazis?
■ Why did they target Jews?
Explanation:
1. Come together to advance a cause
2. I believe manner
Brady
It would have knocked France out quickly enabling Germany to concentrate all her efforts on Russia