The U.S.A. Trilogy is a series of three novels that chronicle the lives of various characters in the first half of the 20th century in the United States. The narrative intertwines the stories of twelve characters as they navigate the societal changes and upheavals of the era, including World War I, the Great Depression, and the rise of Hollywood. The author uses a unique narrative technique that combines traditional prose, newspaper-style headlines, biographies, and stream-of-consciousness writing to paint a vivid picture of American life during this period.

"Legends of the Fall" is a collection of three novellas, each exploring themes of love, war, and betrayal against the backdrop of the American wilderness. The titular novella follows the lives of three brothers and their father living in the remote wilderness of Montana in the early 1900s. The three brothers, each vastly different in character, find their bond tested when they all fall in love with the same woman. Their individual and collective decisions lead to a series of tragic events that shape their destiny. The other two novellas also deal with complex relationships and moral dilemmas, set against the harsh and unforgiving landscapes of America.

The novel follows the life of Claude Wheeler, a young Nebraska native who is dissatisfied with his prosperous farming life. When the United States enters World War I, he sees it as an opportunity to find purpose and meaning, and enlists in the army. The book explores his experiences and struggles in the war, his longing for home, and his ultimate sacrifice, providing a poignant commentary on the impact of war on the individual and society.

This novel is a World War I allegory where a Christ-like figure emerges within a French regiment, sparking a mutiny. The figure, a corporal, persuades his squadron to not attack in the bloody conflict, leading to their court-martial and execution. The narrative explores themes of war, morality, and the human spirit, with the corporal's actions causing a ripple effect, impacting the lives of soldiers, officers, and even a Jesuit priest.