How/when did Superman and Batman first meet

?

The earliest I can find on this site is World's Finest Comics #2. They may have been in #1 together, or they may not have actually been in the same story together in that issue. I don't know what they were doing in their first meeting, but it probably involved punching Nazis.

there is an underground path under the fortress of solitude that runs to a route to the Bat cave.  They met half way one time lol