"Based on comprehensive data from conflict databases, academic estimates, and reports on civilian casualties in foreign wars (excluding domestic conflicts or genocides within a country’s own borders), the United States is responsible for the highest number of civilian deaths in other countries since 1960. This is primarily driven by major US-led or US-involved interventions, with total estimates exceeding 4 million civilian fatalities across multiple conflicts (figures vary due to challenges in attribution and indirect causes like famine or disease exacerbated by war)."
https://sonar21.com/by-the-numbers-which-nation-is-the-deadliest-terrorist/
Sad but true...
"The public perception of war has changed radically over the past few decades. It is no longer viewed as the abomination that it is. The consequences are dire: World War III is imminent."