Lamarin da ya faru a ranar 13 ga watan Mayu wani lamari ne na rikicin kabilanci tsakanin Sino-Malay da ya faru a Kuala Lumpur, babban birnin Malaysia, a ranar 13 ga Mayun 1969. Rikicin ya faru ne bayan babban zaben Malaysia na 1969 lokacin da jam'iyyun adawa irin su Democratic Action. Jam'iyyar da Gerakan sun samu nasara a kan jam'iyyar kawance mai mulki, Alliance Party.Rahotannin hukuma da gwamnati ta fitar sun nuna adadin wadanda suka mutu sakamakon tarzomar ya kai 196, ko da yake majiyoyin diflomasiyya da masu lura da al’amura na kasa da kasa a lokacin sun nuna cewa adadin ya kai kusan 600 yayin da wasu kuma suka ce adadin ya fi haka, inda akasarin wadanda abin ya shafa ‘yan kabilar China ne.^[87] Rikicin kabilanci ya haifar da ayyana dokar ta-baci ta kasa ta Yang di-Pertuan Agong (King), wanda ya haifar da dakatar da majalisar.An kafa Majalisar Ayyuka ta Kasa (NOC) a matsayin gwamnatin rikon kwarya don gudanar da mulkin kasar na dan lokaci tsakanin 1969 zuwa 1971.Wannan taron dai ya kasance muhimmi a siyasar kasar Malaysia inda ya tilastawa faraministan farko Tunku Abdul Rahman sauka daga mukaminsa tare da mika ragamar mulki ga Tun Abdul Razak.Gwamnatin Razak ta sauya manufofinta na cikin gida don fifita Malaysiya tare da aiwatar da Sabuwar Tsarin Tattalin Arziki (NEP), kuma Jam'iyyar Malay UMNO ta sake fasalin tsarin siyasa don ciyar da mulkin Malay bisa akidar Ketuan Melayu (lit. "Malay Supremacy"). .^[88]