Ow did the United States justify and achieve Manifest Destiny?

research their topic using 3 Primary sources and 3 Secondary sources incorporating into their paper 3 citations from each source they use and find to satisfy the requirements. The length of their research paper will be of 6-7 pages where they will use their sources (citations) wisely as well as their crafting of a paper that highlights their research, writing and analyzing skills fully.
Font: 12 point, News Roman and double spaced.
Format: The title of the book will be in the center of the page and Italicized.
Paragraphs: Each paragraph written must be at least 4 to 6 sentences.