<prompt> Qedela umusho olandelayo: ISoviet Union yayikholelwa ukuthi inqubo yokukhululwa kwezomnotho yayiyophela nge-state socialism ezweni futhi ngo-August 21, 1968,  <response>: Amabutho eSivumelwano SaseWarsaw ahlasela. Kamuva, isizathu samaSoviet sokuhlasela saziwa ngokuthi iBrejnev Doctrine. 