This is an index of lists detailing military conflicts involving the United States, organized by time period.
Although the United States has formally declared war only five times and these declarations cover a total of 11 separate instances against specific nations, there are currently 199 non-colonial military conflicts included in these lists, eight of which are ongoing. Between all six lists, there are currently 237 military conflicts.
Formal declarations of war include the War of 1812 (United Kingdom), the MexicanâÂÂAmerican War (Mexico), the SpanishâÂÂAmerican War (Spain), World War I (Germany and Austria-Hungary) and World War II (Japan, Germany, Italy, Bulgaria, Hungary and Romania).
Since World War II, the U.S. has engaged in numerous military operations authorized by Congress or initiated by the executive branch without formal declarations of war; notable examples include the Cold War (the Korean War, the Vietnam War, and the Gulf War) and the War on terror (the War in Afghanistan, and the Iraq War).
As of the current date, the United States is involved in 8 publicly known military engagements across 6 different wars. Wars with direct U.S. involvement include War on terror (Somalia, Syria and Yemen), the war on cartels (Operation Southern Spear) and the Iran war. Wars with indirect U.S. involvement include the Russo-Ukrainian war (U.S. involvement), the Gaza war (U.S. involvement), and the IsraelâÂÂHezbollah conflict.