World War II: After the Motor Torpedo Boat PT-109 is rammed and sunk by the Japanese destroyer Amagiri, Lt. John F. Kennedy, future U.S. president, saves all but two of his crew.

World War II or the Second World War was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks and aircraft played major roles, enabling the strategic bombing of cities and delivery of the first and only nuclear weapons ever used in war. World War II is the deadliest conflict in history, causing the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

PT-109 was an 80-foot (24 m) Elco PT boat last commanded by Lieutenant John F. Kennedy, future United States president, in the Solomon Islands campaign of the Pacific theater during World War II. Kennedy's actions in saving his surviving crew after PT-109 was rammed and sunk by a Japanese destroyer earned him several commendations and made him a war hero. Back problems stemming from the incident required months of hospitalization at Chelsea Naval Hospital and plagued him the rest of his life. Kennedy's postwar campaigns for elected office referred often to his service on PT-109.

The Imperial Japanese Navy was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender in World War II. The Japan Maritime Self-Defense Force (JMSDF) was formed between 1952 and 1954 after the dissolution of the IJN.

Amagiri was the 15th of 24 Fubuki-class destroyers, built for the Imperial Japanese Navy following World War I. She is most famous for ramming the PT-109 commanded by Lieutenant John F. Kennedy, who would later become the 35th President of the United States.