A. Because if you only hear from one side of a war then you only get their side of the story, and there are always two sides to a story
I believe the answer is false
The Battle of Marathon (Ancient Greek: Μάχη τοῦ Μαραθῶνος, romanized: Machē tou Marathōnos) took place in 490 BC during the first Persian invasion of Greece. It was fought between the citizens of Athens, aided by Plataea, and a Persian force commanded by Datis and Artaphernes.
If we didn't westward expand as early as we did we wouldn't have all of the geographic patterns we have today in the U.S.