This is Doomsday prepping, European style. Secret documents revealed Wednesday that Berlin has begun making plans for how it could help deploy as many as 800,000 NATO troops — including Americans — into Ukraine as Russia’s nuclear saber-rattling reaches new heights.

Germany is preparing for the potential deployment of up to 800,000 NATO troops, including American forces, to Ukraine.

All-out war in Europe may be imminent after U.S. President Joe Biden gave Ukraine the green light to launch U.S. missiles into Russia, prompting it to change its nuclear policy, amid its two-year-plus-long conflict.

German businesses are being advised by the army on how to cope in the event of war breaking out with Russia. A secretive 1,000-page document, named Operations Plan Germany, contains tips for businesses on how to keep operations running smoothly in wartime,

Ukraine’s use of US-supplied ATACMS missiles in Russia has raised fears of escalation, with Moscow warning of potential direct conflict involving Western nations. Amid this backdrop, Germany is preparing for emergency to act as a logistical center for NATO in the event of further Russian maneuvers.