Local opposition gained room to act when Soviet leaders stopped using force to preserve allied communist regimes.
Keep two groups separate: Poland, Hungary and East Germany were allied states under Soviet influence, while republics such as Russia and Ukraine were parts of the USSR itself. Gorbachev wanted lower tension and fewer military commitments. He moved away from using Soviet force to keep allied communist governments in power. Local leaders could no longer rely on that support, and opponents had more room to press for change. In Poland, negotiations and the partly free June 1989 elections helped Solidarity move into government. Hungary opened its border with Austria, giving East Germans a route to leave for the West; departures and demonstrations increased pressure on East Germany's leaders.
The Berlin Wall had restricted movement between East and West Berlin. Its opening on 9 November 1989 symbolised the wider collapse of division, but protest, migration, negotiation and local decisions drove the process. Elsewhere, communist parties also lost their exclusive control of government. Most transitions avoided large-scale warfare, although Romania's overthrow was violent. Germany reunified in 1990 and the Warsaw Pact dissolved in 1991. These changes ended Soviet control over many allies; they did not themselves dissolve the USSR.
Worked example: Explain why the same grievance can have a different result
Why did resistance in 1989 achieve changes that Soviet force had prevented in 1968?
- Economic and political grievances mattered in both periods.
- In 1968, intervention helped preserve communist control; in 1989, Soviet non-intervention removed that external guarantee.
- Local opposition and leadership decisions could then produce a different outcome. Non-intervention enabled change; it did not replace the work of local movements.
Watch out for this
Soviet non-intervention is enough to explain the 1989 changes without considering local people.
It removed the threat that Soviet forces would rescue allied governments, but local protests, migration, negotiations and leadership decisions still produced the changes. An opening for action is not the same as the action itself.
Check your understanding
Why should the 1989 Eastern European changes be distinguished from the 1991 Soviet breakup?
- Poland and Hungary were Soviet republics, so a change in their governments dissolved the USSR.
- Communist rule changed in separate allied states before the USSR itself broke into independent republics.
- The Berlin Wall's opening immediately made Germany one state and ended the Warsaw Pact.