Total Societal Breakdown
Nuclear Winter
Nuclear Fallout
Significant percentage of cities destroyed.
Mass Displacement of nearly all global populations.
Near total breakdown or destruction of modern infrastructure; power, water, emergency services, fuel, medical.
Global trade and manufacturing effectively halted with large portions destroyed in the invasion.
Global transportation effectively halted due to lack of fuel, spare parts, occupation forces seizing it, or a combination of all three.
Mass starvation beginning.