A question

Something bothers me...

Dalaran was destroyed by Archimonde...
And now it just took off to Northrend...
Has it been rebuilt or what? Or did i miss something in the lore?

"The city was defended by Dalaran Guard Towers and archmagi, but was ultimately destroyed following the summoning of Archimonde to Azeroth. The great demon single-handedly laid waste to the city by creating a magical effigy out of the dust, which he then crushed; the mighty towers of Dalaran fell simultaneously. Soon after the defeat of the Burning Legion, however, Alliance forces under the command of Grand Marshal Garithos regained the ruins of the city; some refugees from Lordaeron eventually made their way there as well.

The surviving magi of the Kirin Tor later returned with the intent of rebuilding, and erected a large, magical time-and-space distortion field around the city to ward off a new attack while they slowly regained their strength. The shield is opaque and completely impenetrable by any known means. Now the lands around the ruins of Dalaran are the site of a guerrilla war between the Alliance and the Forsaken."

taken from Wowwiki.

So, according to this, the surviving magi of the Kirin Tor have been hiding behind their shield and have been rebuilding the city, and now with Malygos having declared war on all magic users Dalaran has gone there to wage war on him.

Ah.. Thanks.