.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}You can help expand this article with text translated from the corresponding article in Russian. (September 2023) Click [show] for important translation instructions.
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The military counterintelligence departments of the Soviet Armed Forces existed at all larger military formations and were called Special Departments (Russian: Особый отдел (ОсО)) or third departments/sections. The staff of the Special Department would usually establish a secret network of informants.
TGU (ТГУ КГБ СССР, 3 ГУ КГБ СССР ('third')) functionaries were responsible for protection of the military units, important servicemen (e.g. commanding officers) against activities of foreign military attaché offices diplomats.