The chapter titles that identify the MOST DIRECT reasons that the U.S. declared war on Germany in 1917 are:
- Deadly Submarine and Its Stealthy Destruction
- The Supreme Crime Against Civilization: The Tragic Destruction of the Lusitania
- How "Neutral" Water Are Violated
These titles directly refer to submarine warfare, the sinking of the Lusitania, and violations of neutral rights, all of which were significant factors that contributed to the U.S. decision to enter the war.