1920: America's Great War is an alternate history novel by Michigan economics professor Robert Conroy. It was first published as an ebook by Baen Books in November 2013; a hardcover edition followed in December of the same year, and a paperback edition in March 2015. The novel depicts a fictional world where Imperial Germany had emerged victorious early in World War 1, and launches a surprise invasion of the United States in the year 1920 from Mexico. The book's premise is based on an actual plan Germany had proposed to Mexico during the Great War.