When did Detective comics become exclusively Batman?

[Darkseid Is]

I know all of the Golden Age books had a bunch of different stories starring a bunch of different characters. What was the year or the issue that Batman became the solo story in Detective Comics?

[jb681131]

I know all of the Golden Age books had a bunch of different stories starring a bunch of different characters. What was the year or the issue that Batman became the solo story in Detective Comics?

I don't know, but I can tell that in the Silver and Bronze ages there are lots of issues with a backstory on another character. Also, through time the Batfamilly will grow, and Detective Comics will become more of a "Batfamilly" book than a Batman (or Batman & Robin) one.
There will be some issues were Batman is not even there, but only the other members of the familly. So Detective Comics has never really been a solo Batman comics.

[Coco Loco]

Detective pretty much always had at least one backup feature until the mid-80’s - #568 was when those went away. That’s leaving aside the occasional full-length issue.

[millernumber1]

Detective pretty much always had at least one backup feature until the mid-80’s - #568 was when those went away. That’s leaving aside the occasional full-length issue.

The backup came back several times, though.