Download or read book The Threshold of Manifest Destiny written by Laurel Clark Shire and published by University of Pennsylvania Press. This book was released on 2016-09-05 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Among the many contentious frontier zones in nineteenth-century North America, Florida was an early and important borderland where the United States worked out how it would colonize new territories.