Usher in

фразовый глагол возвещать (наступление, приход чего-либо) Например: When was the atomic age ushered in? — Когда началась ядерная эпоха?

Большой англо-русский словарь

Usher in

transitive verb 1. to serve to bring into being Example: a discovery that ushered in a period of change 2. to mark or observe the beginning of Example: ushered in the new year with merrymaking Synonyms: see begin

Merriam-Webster's Collegiate Dictionary