Do not go gentle,
into the Old Night.
Rage, rage,
against the dying of the light.
World War III is an event that is fated to happen at some point in the near future. Most of the time it results in the complete annihilation of human civilisation as a result of Mutually Assured Destruction (MAD), the military doctrine on both sides of the Cold War that dictates a nuclear exchange must destroy both combatants wholly. On certain timelines, as is the case with Song of Infinity - Alpha Timeline, World War III continues as a decadent total war characterised by stable frontlines, the absence of strategic nuclear weapons and constant massed slaughter. Later, a number of otherworldly or post-human combatants join into the fray, inviting new and novel ways for the world to end.
Regardless of its outcome, World War III cannot be stopped, and will always result in the destruction of humanity in one way or another.