Korea and Vietnam simply weren’t as significant as the Revolutionary War, the War of 1812, the Mexican War, the Civil War, the Spanish-American War, the First World War, or the Second World War. They weren’t completely insignificant historical events, but they also just aren’t comparable to the half dozen biggest wars in US history, and that’s what I call “major wars” because the marginal difference between WWII and Korea is so much bigger than the marginal difference between Korea and, say, Grenada.