Christopher D. O'Sullivan is the author of several books, including FDR and the End of Empire (Palgrave Macmillan, 2012) and Sumner Welles, Postwar Planning and the Quest for a New World Order (2009) which won the American Historical Association's Gutenberg Prize. He teaches history at the University of San Francisco and is a recipient of their Innovations in Teaching Award as well as their Distinguished Lecturer Award and was a Fulbright Visiting Professor at the University of Jordan.

• 1 Introduction.- 2 Rough Rider.- 3 Joining the War Cabinet.- 4 Secretary of the Navy.- 5 Undeclared War in the Atlantic.- 6 War with Japan.- 7 Fighting Back.- 8 War for the Pacific.- 9 Conclusion.

“Frank Knox: Roughrider in FDR’s War Cabinet, a biography based primarily on Knox’s papers. The book provides a detailed account of Knox’s life and career and context for his achievements. O’Sullivan makes the case that Knox deserves to be included with Stimson and Marshall as one of the principal architects of the Allied victory in World War II.” (Mary Jo Binker, H-Diplo, H-Net Reviews, October 23, 2024)