Young European Socialists (YES), formerly the European Community Organisation of Socialist Youth (ECOSY), is an association of social democratic youth organisations in Europe and the European Union. YES is the youth organisation of the Party of European Socialists (PES) and is a sister organization of the International Union of Socialist Youth (IUSY). The seat of the organisation is Brussels. Full members status is held to the European Youth Forum (YFJ) which operates within the Council of Europe and European Union areas and works closely with both these bodies. History YES was founded as the European Community Organisation of Socialist Youth (ECOSY) in November 1992 in Oegstgeest/The Hague. The preparatory committee consisted of Philip Cordery (MJS, France), Joris Jurriëns (JS-PvdA, Netherlands), Jens Geier (Jusos, Germany), Giustina Magistretti (Italy), and Pascal Smet (Belgium). Before 1992 the European activities had been coordinated inside IUSY, especially in the European Leaders Meeting. The foundation of ECOSY had been controversial. In particular, the Austrians and the Swedes promoted an all-European organisation, including non-EU members. The European Socialist Youth (ESY), founded in parallel, was only a weak organisation, a short time later renamed the European Committee, one of the IUSY continental committees. The organisation's name was changed to Young European Socialists (YES) at the 11th Congress in Bommersvik in 2013. Affiliated organisations Full members — Forum of Eurosocialist Youth of Albania (FRESSH) also Youth Movement for Integration (LRI) — Հայկական Երիտասարդաց Դաշնակցութիւն (ՀԵԴ) — Sozialistische Jugend Österreich (SJÖ) — Verband Sozialistischer StudentInnen Österreichs (VSStÖ) — Jongsocialisten — Mouvement des Jeunes Socialistes (MJS) — Forum Mladih SDP / Social Democratic Youth (SDY) — Европейска лява младежка алтернатива (ЕЛМА) / European Left Youth Alternative (ELYA) — Младежко Обединение БСП (МБСП) / BSP Youth Union (BSPYU) — SDP Youth Forum (FM SDP) — EDEK Youth — Republican Turkish Party (CTP) Youth — Mladí Sociální Demokraté (MSD) — Danmarks Socialdemokratiske Ungdom (DSU) — Social Democratic Youth (SDY) — Social Democratic Youth (SDY) — Sosialidemokraattiset Opiskelijat (SONK) — Mouvement des Jeunes Socialistes (MJS) — Jusos in der SPD — Sozialistische Jugend Deutschlands – Die Falken (SJD-Die Falken) — PASOK Youth — Societas – Young Left — Ungir Jafnaðarmenn (UJ) — Labour Youth — Giovani Democratici (GD) — Federazione dei Giovani Socialisti (FGS) — Jauniešu organizācija Restart.lv — Jaunatnes Sociāldemokrātiskā Savienība (JSS) — Lithuanian Social Democratic Youth Union (LSDYU) — Jeunesses Socialistes Luxembourgeoises (JSL) — Forum Zghazagh Laburisti (FZL) — Youth Council of