the Society of Saint Ilia the Righteous (SSIR), a combination of a religious society and a political party which became the basis for his own political movement. The following year, the brutal suppression by Soviet forces of a large peaceful demonstration held in Tbilisi on 4-9 April 1989 proved to be a pivotal event in discrediting the continuation of Soviet rule over the country. The progress of democratic reforms was accelerated and led to Georgia's first democratic multiparty elections, held on 28 October 1990. Gamsakhurdia's SSIR party and the Georgian Helsinki Union joined with other opposition groups to head a reformist coalition called "Round Table — Free Georgia" ("Mrgvali Magida — Tavisupali Sakartvelo"). The coalition won a convincing victory, with 64% of the vote, as compared with the Georgian Communist Party's 29.6%. On 14 November 1990, Zviad Gamsakhurdia was elected by an overwhelming majority as chairman of the Supreme Council of the Republic of Georgia.