Military history of the United States

Military history of the United States
Name	Military history of the United States
Country	United States
Branch	Continental Army, United States Army, United States Navy, United States Marine Corps, United States Coast Guard, United States Air Force
Founded	1775

Contents

Colonial and Revolutionary Era (1607–1783)
Early Republic and 19th Century Conflicts (1784–1898)
World Wars and Interwar Period (1914–1945)
Cold War and Postwar Interventions (1947–1991)
Post–Cold War Operations and Global War on Terror (1992–2021)
Organization, Doctrine, and Technological Evolution

Military history of the United States covers armed conflict involving Jamestown, Plymouth, New Netherland, and later the United States. It encompasses colonial campaigns such as King Philip's War and transatlantic contests like the Seven Years' War, the revolutionary struggle of the American Revolutionary War, continental expansion wars including the War of 1812 and the Mexican–American War, global conflicts such as World War I and World War II, Cold War crises like the Korean War and the Vietnam War, and post–Cold War operations in Somalia, Bosnia, Iraq, and Afghanistan. The narrative ties together leaders like George Washington, Thomas Jefferson, Abraham Lincoln, Theodore Roosevelt, Franklin D. Roosevelt, and Dwight D. Eisenhower with institutions including the Continental Congress, the United States Department of Defense, and the Joint Chiefs of Staff.

Colonial and Revolutionary Era (1607–1783)

Colonial-era conflicts involved Powhatan Confederacy clashes at Jamestown, Pequot War actions in Connecticut, and the wider struggle of King Philip's War across New England. Imperial rivalries produced the French and Indian War as part of the Seven Years' War between Great Britain and France, shaping frontier leaders such as George Washington and commanders like Edward Braddock. Revolutionary politics saw the Boston Massacre, the Boston Tea Party, and the battles of Lexington and Concord leading to the Siege of Boston, the formation of the Continental Army under George Washington, and decisive engagements at Saratoga and Yorktown that involved allies such as France and commanders including Marquis de Lafayette and Comte de Rochambeau.

Post-Revolution military organization under the United States Constitution featured debates involving Alexander Hamilton and the establishment of the United States Military Academy at West Point. The Quasi-War with France and the Barbary Wars showcased naval leaders like John Paul Jones antecedents and later figures such as Stephen Decatur. The War of 1812 against Great Britain produced engagements at Baltimore and the writing of the Star-Spangled Banner by Francis Scott Key, while frontier campaigns against Tecumseh and conflicts with Seminole people involved officers including Andrew Jackson. Westward expansion prompted the Mexican–American War with battles at Vera Cruz and Buena Vista, influencing statesmen such as James K. Polk and generals like Winfield Scott. The American Civil War between the Union and the Confederate States of America featured commanders Ulysses S. Grant, Robert E. Lee, William Tecumseh Sherman, and battles at Gettysburg and Antietam, while Reconstruction-era policies tied to leaders like Abraham Lincoln and Andrew Johnson affected the United States Army.

American involvement in World War I under leaders such as Woodrow Wilson and commanders like John J. Pershing saw the American Expeditionary Forces deployed in the Western Front and concluded with the Treaty of Versailles. Between the wars, debates over isolationism involved figures like Charles Lindbergh and institutions such as the Neutrality Acts, while naval expansion echoed ideas from Alfred Thayer Mahan. World War II mobilization under Franklin D. Roosevelt and later Harry S. Truman involved theaters in Europe, the Pacific War, and campaigns at Normandy, Anzio, Iwo Jima, and Okinawa. Strategic decisions at the Yalta Conference and the use of Little Boy and Fat Man on Hiroshima and Nagasaki ended hostilities, and postwar planning created the United Nations, the NATO, and institutions such as the Central Intelligence Agency.

The Cold War era featured nuclear deterrence strategies tied to the Truman Doctrine, the Marshall Plan, and the formation of NATO confronting the Soviet Union. The Korean War involved Douglas MacArthur and the 38th parallel, while the Vietnam War saw operations in South Vietnam, debates in Congress, and leaders such as Lyndon B. Johnson and Richard Nixon implementing policies like Vietnamization and negotiating at the Paris Peace Accords. Cold War crises included the Berlin Airlift, the Cuban Missile Crisis with John F. Kennedy, and covert actions by the Central Intelligence Agency in places like Guatemala and Iran. Later Cold War interventions involved proxy conflicts and deployments to Angola, Grenada, and Panama, culminating in détente efforts such as arms control treaties like SALT and the INF Treaty between Ronald Reagan and Mikhail Gorbachev.

Post–Cold War operations included humanitarian and enforcement missions in Somalia during Operation Restore Hope, peacekeeping in Bosnia under Operation Joint Endeavor, and the 1991 Gulf War against Iraq led by Norman Schwarzkopf and authorized by United Nations Security Council resolutions. The September 11 attacks prompted the War in Afghanistan and the Iraq War under administrations of George W. Bush and later Barack Obama, involving operations such as Operation Enduring Freedom and Operation Iraqi Freedom, the deployment of Marines and Special Operations Command units, and controversies over detention at Guantanamo Bay and interrogation policies including Enhanced interrogation techniques. Counterterrorism efforts included drone campaigns, NATO operations such as Operation Unified Protector linkage in Libya, and multinational coalitions confronting ISIS in Syria and Iraq during the Global War on Terror era.

U.S. armed forces evolved through institutional reforms like the National Security Act of 1947, creation of the Department of Defense, and doctrine articulated by thinkers such as Carl von Clausewitz readers and practitioners like William S. Lind. Organizational bodies include the Joint Chiefs of Staff and combatant commands such as U.S. Central Command and U.S. Indo-Pacific Command. Technological change ranged from sail and muskets to nuclear-powered carriers like USS Enterprise (CVN-65), strategic bombers such as the Boeing B-52 Stratofortress, stealth platforms like the F-22 Raptor, and space-era capabilities via United States Space Force antecedents and DARPA innovations. Logistics and industrial mobilization involved entities like War Production Board and firms including Boeing, Lockheed Martin, Northrop Grumman, shaping force structure reflected in doctrines such as AirLand Battle and concepts like shock and awe.