The U.S. has not won a major, declared war post-1945 in the conventional sense , leading to debates over what constitutes a "win." While achieving clear military victories in smaller conflicts—such as the Gulf War (1991), Grenada (1983), and Panama (1989)—the U.S. has struggled with stalemates (Korea) and unsuccessful nation-building in long-term engagements like Vietnam, Iraq, and Afghanistan. Key Post-1945 Conflict Outcomes: Gulf War (1990-1991): Generally considered a clear victory, as the U.S. successfully expelled Iraq from Kuwait. Invasions of Grenada (1983) and Panama (1989): Successful, swift, minor military actions to remove governments. Korean War (1950-1953): Ended in a stalemate and armistice, not a definitive win. Vietnam War (1955-1975): The U.S. withdrew in 1973, and South Vietnam fell in 1975, resulting in a loss. Iraq War (2003-2011) and Afghanistan War (2001-2021): These long-term engagements ended without achieving long-term stability or their original nation-building goals.
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