This book examines the period of America's greatest territorial growth as the country doubled in size expanding westward, carrying out our Manifest Destiny to expand across the continent. Using maps and easy-to -understand language, it discusses the Louisiana Purchase in 1803, the annexation of Texas in 1845, the absorption of Oregon Country, and the acquisition of the New Mexico and California territories after the war with Mexico. Descriptions of American settlements and achievements, the nation's early democratic government, and the religious American lifestyle are used to elucidate Americans' true belief in Manifest Destiny.