On 9th April 1989, Georgian nationalists protested against the rights of the Abkhazian minority.
Soviet troops killed 19 Georgian protesters and wounded thousands more.
Killings outraged Georgian nationalists and led to concern amongst nationalists in all of the republics that the Soviet Government was prepared to use lethal force to stop nationalism.
Government refused to take responsibility for the killings and blamed local leaders.
Military commanders became unwilling to use force against protesters, which became known as “Tbilisi syndrome”.
The Tbilisi massacre demonstrated the limits of Gorbachev’s real power and weakened the government’s position, as they could no longer rely on military support.