Amy S. Greenberg is George Winfree Professor of History at Penn State University. She is the author of five books, including A Wicked War: Polk, Clay, Lincoln and the 1846 U.S. Invasion of Mexico (...lihat lebih banyakAmy S. Greenberg is George Winfree Professor of History at Penn State University. She is the author of five books, including A Wicked War: Polk, Clay, Lincoln and the 1846 U.S. Invasion of Mexico (Knopf, 2012), Manifest Destiny and American Territorial Expansion: A Brief History with Documents (Bedford/St. Martin’s, 2012), and, most recently, Lady First: The World of First Lady Sarah Polk (Knopf, 2019).lihat lebih sedikit