intervene between (someone and someone else)
to intercede between someone and someone else. I decided to intervene between Ralph and his brother, who were arguing endlessly. There was no point in intervening between Bill and Bob.
intervene in something
to get involved in something. I will have to intervene in this matter. It's getting out of hand. I want to intervene in this before it becomes a major problem.
intervene with someone or something
to step into a matter concerning someone or something. Megan said she would intervene with the bank manager on our behalf. Do I need to intervene with this process?