In the republics of the Soviet Union, between around 1988 and 1992 (when the USSR had dissolved, and the republics were all independent), the term "Popular Front" had quite a different meaning. It referred to movements led by members of the liberal-minded intelligentsia (usually themselves members of the local Communist Party), in some republics small and peripheral but in others broad-based and influential. Officially, their aim was to defend "perestroika" against reactionary elements within the state bureaucracy, but over time, they began to question the legitimacy of their republics' membership of the Soviet Union. It was their initially cautious tone that gave them considerable freedom to organise and to gain access to the mass media. In the Baltic republics, they soon became the dominant political force and gradually gained the initiative from the more radical dissident organisations established earlier by moving their republics towards greater autonomy and then independence. They also became the main challengers to the Communist Parties' hegemony in Belarus, Moldova, Ukraine, Armenia and Azerbaijan. A Popular Front was established in Georgia but remained marginal, compared to the dominant dissident-led groups, since the April 9 tragedy had radicalised society and so it was unable to play the compromise role of similar movements. In the other republics, such organisations existed but never posed a meaningful threat to the incumbent party and economic elites.