Ku munsi wa gatanu igenekerezo rya 15 Nzero niho hibukwa imyaka 55 iheze Pierre Ngendandumwe yahoze umushikirangoma wa mbere ku ntwaro ya Mwambutsa. Akaba ari mu baharaniye ukwikukira kw’abarundi hamwe n’umuganwa Ludoviko Rwagasore. Alphonse Rugambarara, umunyepolitike, agahanura abategetsi bo muri iki gihe gukurikiza iragi yasize, na cane cane mu guharanira ubumwe bw’abarundi bose.