Memorial Day: America’s 7 costliest wars
4. Vietnam War
One of the longest conflicts in American history, the Vietnam War began as a limited effort to prevent the spread of communism in Southeast Asia before escalating into a full-scale conventional war.
The conflict, which spanned the 1960s and early 1970s, became a major source of social upheaval in the U.S. It is often remembered as the first war the United States lost after South Vietnam fell to communist forces in 1975.
More than 58,000 Americans died during the conflict, according to the National Archives, with over 40,000 killed in combat and the rest dying from other causes.
Fred Logevall, a history professor at Harvard University, stated in a 2025 lecture that he believed “many of the troubles that plague our nation today — alienation, resentment, cynicism, the mistrust of government, the breakdown of civil discourse and of civic institutions, and the lack of accountability in powerful institutions — have their roots in the Vietnam War era.”
“You could argue that Americans went from naivete at the outset of the Vietnam era to cynicism — and cynicism, which alienates us from the government, threatens democracy because it destroys the power of the people to believe in change, and to work for change,” he added.
