One of Suvorov's pieces of evidence favoring the theory of an impending Soviet attack was his claim regarding the maps and phrasebooks issued to Soviet troops. Military topographic maps, unlike other military supplies, are strictly local and cannot be used elsewhere than in the intended operational area. Suvorov claims Soviet units were issued with maps of Germany and German-occupied territory, and phrasebooks including questions about SA offices—SA offices were found only in German territory proper.