The United States has been involved in 114 military conflicts. These include major conflicts like the American Revolutionary War, the War of 1812, the Mexican–American War, the American Civil War, the Spanish-American War, World War I, World War II and the Gulf War. It also includes US involvement in widespread periods of conflict like the Indian Wars, the Cold War (including the Korean War and the Vietnam War), and the War on Terror (including the Iraq War, the War in Afghanistan, and others). Four military engagements encompassing three wars, all of which are interventions, currently involve the US: the Yemeni Civil War, the Somali Civil War, and the Syrian Civil War.

• e.g. a treaty or peace without a clear result, status quo ante bellum, result of civil or internal conflict, result unknown or indecisive, inconclusive

18th-century wars

19th-century wars

20th-century wars

21st-century wars