From the Hunley to the Nuclear Age: The History of U.S. Submarine Warfare

Submarines have long occupied a special place in American naval history: silent, patient, and often unseen, yet capable of shaping entire wars. What began as an experimental undersea weapon in the early 20th century evolved into one of the most strategically important arms of the U.S. military. From the hard-fought undersea campaigns of World War I, to the decisive commerce-raiding patrols of World War II, to the stealthy nuclear deterrent patrols of the Cold War, U.S. submarine warfare has reflected the changing nature of naval power itself. The history of the American submarine force is a story of innovation, endurance, and strategic adaptability.

Early Foundations and World War I

Although submarine warfare is most closely associated with the 20th century, the American fascination with underwater attack stretches back much farther. During the Civil War, the Confederate submarine H.L. Hunley famously sank USS Housatonic in 1864, becoming the first submarine to sink an enemy warship in combat. The U.S. Navy, however, did not immediately build a large undersea force. That changed as advances in propulsion, batteries, torpedoes, and hull design made submarines more practical.

By the time the United States entered World War I in 1917, submarines were still relatively new weapons. The American submarine force was small, but it was growing in professionalism and technical competence. U.S. submarines were not major combatants in the Atlantic during the war, where German U-boats dominated the undersea battlefield, but the conflict still mattered enormously. American officers studied German successes and failures, and the war underscored the submarine’s value as a commerce raider, fleet scout, and ambush weapon.

World War I helped define the submarine as a weapon of strategy rather than novelty. It also pushed the U.S. Navy to invest in better boats, better training, and better doctrine. The submarine was no longer an experiment. It was becoming a permanent part of American naval power.

The Interwar Years: Building the Modern Submarine Force

The years between the world wars were crucial for the development of U.S. submarine warfare. Naval planners recognized that future conflicts in the Pacific would likely require long-range submarines capable of operating far from home ports. This era produced major advances in submarine design, including larger boats with greater range, improved endurance, and more reliable torpedoes—though the latter would remain a source of frustration for years.

One of the most important developments was the creation of the “fleet submarine,” designed to operate with the battle fleet and to strike enemy warships or commerce over long distances. U.S. submarine doctrine began to emphasize stealth, endurance, and coordinated operations. The Navy also refined training and tactics, laying the groundwork for the submarine campaigns of World War II.

The interwar period was not glamorous, but it was decisive. American submariners learned how to operate in demanding conditions and how to integrate undersea warfare into broader naval strategy. By 1941, the U.S. submarine force was prepared to play a major role in the Pacific War.

World War II: The Submarine War in the Pacific

If any conflict defined the U.S. submarine force, it was World War II. After the attack on Pearl Harbor, American submarines were among the few U.S. forces immediately able to take the fight to Japan. At first, they faced major obstacles: flawed torpedoes, limited numbers, and the challenge of long-range operations across vast ocean distances. Yet once those problems were addressed, U.S. submarines became one of the most effective offensive weapons in the war.

American submarines waged a relentless campaign against Japanese shipping. Their mission was not only to sink warships, but to strangle Japan’s merchant fleet, cutting off oil, food, raw materials, and military supplies. This campaign proved devastating. By war’s end, U.S. submarines had sunk a substantial portion of Japan’s merchant tonnage and a significant share of its naval vessels.

Several dramatic actions stand out. Submarines played key roles in the Battle of the Philippine Sea, the Battle of Leyte Gulf, and the broader island-hopping campaign by attacking enemy shipping and gathering intelligence. They also rescued downed aviators and supported special operations. Perhaps most famously, submarines like USS Archerfish sank the supercarrier Shinano, while others helped wear down Japan’s ability to fight and resupply its forces.

The human cost was real. U.S. submarine duty was among the most dangerous in the Navy. Crews operated in cramped, humid, and tense conditions, often far from help. Yet submarine service produced some of the war’s most extraordinary achievements. The combination of stealth, patience, and destructive power made submarines a uniquely American instrument of naval warfare.

The Cold War and the Nuclear Revolution

After World War II, the submarine force entered a new era shaped by the Cold War and the arrival of nuclear technology. The development of nuclear propulsion transformed submarine operations. In 1954, USS Nautilus—the world’s first nuclear-powered submarine—went to sea and changed naval history. Nuclear power gave submarines virtually unlimited range and endurance, allowing them to remain submerged far longer than diesel-electric boats ever could.

This was a revolution in undersea warfare. Nuclear-powered submarines could travel faster, stay hidden longer, and operate globally without frequent refueling. The famous signal from Nautilus—“Underway on nuclear power”—captured the dawn of a new age. Soon, the Navy developed classes of attack submarines and ballistic missile submarines that became central to U.S. strategy.

The ballistic missile submarine, or “boomers,” became especially important. Armed with nuclear missiles,