Why must this transpire?

So I just learned from a post on Facebook that the account that I thought wasn't working got hacked, some bad stuff happened, and it got banned. I was on vacation, so I had no idea this had transpired, and I hope that by posting this here, I can clear up that I didn't have anything to do with that, but I'd like to know who did.

Nothing transpired between us.

No one will forget the historic events that transpired on that day.

It transpired that fire was caused by a careless smoker.

Do you think a fight will transpire after school today?

These events transpired while the senator was still in office.

There is nothing new transpired since I wrote you last.