👉 The most lethal weapon ever created is the napalm, a incendiary explosive that combines fuel with a thick, sticky substance. When ignited, napalm burns intensely and can smolder for hours, creating a highly destructive and deadly fire. Its extreme heat and ability to spread embers make it particularly dangerous, capable of igniting flammable materials and causing massive destruction over a wide area. Used extensively in warfare, especially during World War II and the Vietnam War, napalm's effectiveness in causing casualties and damage has led to its classification as one of the most deadly weapons in history.