<a href="https://en.wikipedia.org/wiki/Solidarity_(Polish_trade_union)" id="mwAVw" rel="mw:WikiLink" title="Solidarity (Polish trade union)">Solidarity</a>'s victory in the <a href="https://en.wikipedia.org/wiki/1989_Polish_parliamentary_election" id="mwAV0" rel="mw:WikiLink" title="1989 Polish parliamentary election">1989 Polish legislative election</a> occurs, the first election since the Communist <a href="https://en.wikipedia.org/wiki/Polish_United_Workers'_Party" id="mwAV4" rel="mw:WikiLink" title="Polish United Workers' Party">Polish United Workers' Party</a> abandoned its monopoly of power. It sparks off the <a href="https://en.wikipedia.org/wiki/Revolutions_of_1989" id="mwAV8" rel="mw:WikiLink" title="Revolutions of 1989">Revolutions of 1989</a> in Eastern Europe.