Between a Rock and a Charred Place (5E)

From publisher blurb: Between a Rock and a Charred Place is a 7th-level adventure that thrusts the PCs into the middle of an epic confrontation between the dwarves of the Stoneheart Mountains and the hobgoblins just beyond their borders. Under their new leadership, the hobgoblin warmongers deploy an innovative grand strategy: to forge an alliance with one of the dwarves’ old enemies and a traitor in their foes’ midst. The dwarves’ dominance over the region and very survival hangs in the balance if the PCs cannot thwart the monsters’ ambitious plans.