Close...I worked as part of OpFor (Opposing Forces) in Germany in the early 80's...I would dress in a Soviet lieutenant's uniform and conduct training, as though I was a "defector."

One time we got reported to the MPs (the Russians are coming!) and they came out to the site with a jeep mount 50 cal. and a bunch of trigger-happy soldiers. They were not buying that we were Americans until I pulled out my American Express card...I guess they figured the Soviets could forge US Military IDs, but that they didn't want to mess with AmEx!