The Dark Wizard Grindelwald

In Book One Chapter Six, Harry reads Albus Dumbledore's wizard card. On the back of the card it mentions he "is particularly famous for his defeat of the dark wizard Grindelwald in 1945" I wonder if this is an important thing that may get brought back into Book Seven. Let me explain my thinking. In Book Two at Nick's 500th Deathday Party the cake says he died in 1492 so that means that the year is currently 1992. Also 50 years previously it was 1942 and Tom Riddle was reaking havoc as the Heir of Slytherin in his sixth year (I think). Once he graduated Grindelwald would still have been at large and he drops off the face of the Earth once he kills Hepzibah Smith. Is it possible that while his whereabouts were unknown, that he hooked up with Grindelwald? I have been pondering this for a long time and would dearly like this question answered.

I never made that connection.
It's possible that they knew each other, but it couldn't have been for more than a year.

http://en.wikipedia.org/wiki/Minor_D...n_Harry_Potter says:
Grindelwald was a Dark wizard before Lord Voldemort and his only mention is in Harry Potter and the Philosopher's Stone on Albus Dumbledore's Chocolate Frog card which notes that Dumbledore defeated Grindelwald in 1945.

Grindelwald is a Germanic name: Wald means "Forest", and Grindelwald is a ski resort in Switzerland.

The name Grindelwald also bears a resemblance to the mythic Grendel who was defeated by Beowulf. It is worth noting that one of Dumbledore's middle names is Wulfric - close to Beowulf. Given Rowling's penchant for clever naming, it is likely that this was intended.

http://www.accio-quote.org/articles/...t-anelli-3.htm says:
“…Owen…asked about Grindelwald... He said, 'Is it coincidence that he died in 1945,' and I said no. It amuses me to make allusions to things that were happening in the Muggle world, so my feeling would be that while there's a global Muggle war going on, there's also a global wizarding war going on.

Wikipedia also says that "Grindelwald has something to do with the remaining plot."

Thats very very interesting . . . .

Hmm... Something else to think about.

The word intriguing is "defeated" not "killed" or "dead". So he could definitely come back. Especially if he's in Azkaban which is leaking inmates. A dark wizard who has a vendetta against Dumbledore.