What caused terrible suffering and great sadness during WWll?

During World War II, terrible suffering and great sadness were caused by widespread destruction from battles, bombings, and genocides, including the Holocaust, where millions of Jews and other marginalized groups were systematically murdered. The war led to immense civilian casualties, displacement, and suffering due to famine, forced labor, and atrocities committed by occupying forces. Additionally, the psychological impact of loss, trauma, and the destruction of communities left deep scars on societies around the world. The conflict's global nature exacerbated these effects, resulting in a profound and lasting humanitarian crisis.