Heard of BRIXMIS? SOXMIS was the Soviet equivalent. After ww2 the Comanders in Chief and the Red Army Commander in Chiefs started a liasion/ obsever organisation where by the Allies roamed around East Germany 'Under Diplomatic Protection', that became BRIXMIS and the Soviet's could roam aronud West Germany. The idea was to 'Develop friendship and trust', the result was 40 odd years of quietlly caried on mayhem. I'd recommend BRIXMIS by Tony Gerharty, half the exploits if you put in fiction , you'd never belive it.