I believe the correct answer would be The Second Answer
The Europeans were already familiar with most diseases (they themselves brought some diseases to the Americas) and so they developed immunity to those disease, but the Natives were unfamiliar with those diseases so their systems were still weak fighting those diseases off.
Answer:
Little Round Top
Explanation:
Joshua Lawrence Chamberlain was best known for his bravery in the Battle of Gettysburg who joined the Union Army during the American Civil War. He was awarded the Medal of Honor for his contribution to the war. Chamberlain led a successful defence against the south at Little Round Top. Little Round Top is one of the rocky hills small in size in Gettysburg which is compared with the taller hill named Big Round Top.