Forgotten Shore (Dragonblight)
The Forgotten Shore was the main encampment of 's forces when he set out to Northrend to destroy . After finding and his men and establishing a smaller base camp, Arthas went to rescue the rest of Muradin's men from the undead. A nearby second undead base was razed by Arthas' men, and they were ordered to build a new base on top of it. Later, a messenger from Lordaeron came and told them that they were to "pack up and leave". The Captain replied, "To hell with the Undead! We'll cut our way through the forest, men!" Arthas later returned, seeing that they were ordered to come back to Lordaeron. The prince, however, was determined to stay in Northrend until Mal'Ganis was destroyed. He, Muradin, and two mortar teams recruited a number of mercenaries and destroyed the ships. Arthas then blamed the mercenaries, saying that they had burnt the ships (though it was technically true). The prince's forces later moved up to Drak'Tharon Keep.
Nowadays the place is populated by Forgotten Captains, Forgotten Knights, Forgotten Footmen, Forgotten Riflemen and Forgotten Peasants. , being himself a former member of the 1st Legion, send adventurers to free the ghosts.
The exact location of the Forgotten Shore seems to have undergone a retcon from Warcraft III to World of Warcraft. In Warcraft III, it is on the border of Daggercap Bay, which lies in the Howling Fjord. In World of Warcraft however, it has been moved to the southeastern Dragonblight.
The World of Warcraft RPG mentioned that Valgarde was first built by Arthas when landing on Northrend, which would match with Baelgun's Excavation Site being situated in the Howling Fjord too. However, Valgarde was changed as being built by the forces of the Valiance Expedition instead.
Notice that the name "Forgotten Shore" is first mentioned in World of Warcraft.