Answer:
Quite, they brought unknowingly the diseases that killed most of them.
It is defined as the killing of a ethnic, religious or social group of people which is considered to be against the law and it's violation toward civil rights
Manifest Destiny was a distinctly racist concept in the first place. The idea was that white man was destined to conquer the west and this meant subduing anyone else who happened to live there. White man alone was entitled to this "destiny". It used the ideas of Jacksonian democracy of a "white man's democracy" to develop these beliefs.
The battle of Coral Sea was a draw, but the Japanese was stopped of the advance.
