Original: The foundation of the PS and the '' Union of the Left '' ( 1969-1981 ) In 1969 , during the Alfortville Congress , the SFIO was replaced by the Socialist Party ( Parti socialiste or PS ) .
Simplified: The foundation of the PS and the '' Union of Left '' ( 1969-1981 ) In 1969 the SFIO was replaced by the Socialist Party ( Parti socialiste or PS ) .