"officially formed" — Kollokationen-Wörterbuch Englisch

officially formed Kollokation
Automatische Übersetzung (wir garantieren seine Korrektheit nicht): oficjalnie założyć
  1. form Verb + officially Adverb
    Sehr starke Kollokation

    The three were friends for several years, however, the group did not officially form until 1999.