intervene
US /ˌɪn.t̬ɚˈviːn/
UK /ˌɪn.t̬ɚˈviːn/

1.
eingreifen, intervenieren
come between so as to prevent or alter a result or course of events
:
•
The police had to intervene to stop the fight.
Die Polizei musste eingreifen, um den Kampf zu beenden.
•
He decided to intervene in the dispute between his friends.
Er beschloss, in den Streit zwischen seinen Freunden einzugreifen.
2.
dazwischenliegen, eintreten
(of an event or circumstance) occur between two things, especially so as to prevent or modify a result
:
•
A long period of peace intervened before the next war.
Eine lange Friedensperiode lag dazwischen vor dem nächsten Krieg.
•
Several years intervened between his first and second novels.
Mehrere Jahre lagen zwischen seinem ersten und zweiten Roman.