Progressive Alliance of Socialists and Democrats
The Progressive Alliance of Socialists and Democrats (S&D) is the political group in the European Parliament of the Party of European Socialists (PES). The Progressive Alliance of Socialists and Democrats was officially founded as a Socialist Group on 29 June 1953, which makes it the second oldest political group in the European Parliament after the European People's Party Group (EPP Group).
Source: Wikipedia — Progressive Alliance of Socialists and Democrats (CC BY-SA 4.0)