Stratholme

The city of Stratholme[27, 8] (pronounced ˈstrathːhɔlm[1] or STRATH-olm)[2] was the northernmost and second most populous city of the kingdom of Lordaeron, and is the city where the Order of the Silver Hand was founded. Today, Stratholme is theScourge's capital in Lordaeron. The mad Prince Arthas ravaged Stratholme in the Third War and the undead moved in soon after. Stratholme burns to this day, and its districts have been split between the overzealous Scarlet Crusade led by Grand Crusader Dathrohan, and the Scourge forces led by the death knight Baron Rivendare.

History
From Blizzard's Official World Dungeons site:
 * Once the jewel of northern Lordaeron, the city of Stratholme is where Prince Arthas turned against his mentor, Uther Lightbringer, and slaughtered hundreds of his own subjects who were believed to have contracted the dreaded plague of undeath. Arthas' downward spiral and ultimate surrender to the Lich King soon followed. The broken city is now inhabited by the undead Scourge -- led by the powerful lich, Kel'Thuzad. A contingent of Scarlet Crusaders, led by Grand CrusaderDathrohan, also holds a portion of the ravaged city. The two sides are locked in constant, violent combat. Those adventurers brave (or foolish) enough to enter Stratholme will be forced to contend with both factions before long. It is said that the city is guarded by three massive watchtowers, as well as powerful necromancers,banshees and abominations. There have also been reports of a malefic Death Knight riding atop an unholy steed, dispensing indiscriminate wrath on all those who venture within the realm of the Scourge.