[Uthrecht]

I'd say use Patton as Ike's bird dog. Patton didn't trust the Soviets, and was military governor of Bavaria. I'd say have US command listen to his arguments against demobilizing the Third Army, and either give a tip-off in the form of aerial reconnaissance or just a hunch from his gut, to get him ready for it.

ETA: Looks like Zeener beat me to using Patton Plotdevice, but I'd say use him as a preparatory instrument rather than pre-emptive, since you want the Soviets to strike first.