First visited: 11 November 2026, at level 21
Places within: The Great Sea, Theramore Isle, Dreadmurk Shore
From the lore
Dustwallow Marsh was once a high plain of tall grass, grazed by great herds. The Sundering smashed it down into a valley, and water bled up from underground and has kept it wet ever since. Crocolisks, raptors and spiders wait in every pool and bush. In the south, black dragons nest in such numbers that the land is called the Wyrmbog.
Wild beasts had the marsh to themselves until the Third War. After the battle at Mount Hyjal, Lady Jaina Proudmoore led her people to the eastern shore and raised Theramore on a rocky island. Her father, Grand Admiral Daelin Proudmoore, brought the Kul Tiran fleet against the Horde, and the marsh became a battleground.
Neither the Horde nor the Alliance holds much of it now. A few towers and checkpoints stand along the road to the Barrens, and Theramore's garrison is thinning as soldiers desert, for reasons nobody can explain. The only Horde foothold is Brackenwall Village in the northwest, where the Stonemaul ogres live under Overlord Mok'Morokk.
Source: warcraft.wiki.gg, CC BY-SA 4.0, as retold in the Spoken addon.
Places I found here
Theramore Isle. During the Third War, Lady Jaina Proudmoore led the survivors of Lordaeron across the sea to Kalimdor. (source)
Dreadmurk Shore. The Mirefin murlocs claim this coastline and the scattered islands along it, and they infest it. Sea turtles and other sea creatures share the water. (source)