Source: Taldor, Echoes of Glory, pg(s). 5
Yanmass stands along one of the trade routes that flow across the deserts of the Casmaron linking it with the heartland of the Empire of Kelesh and from there with lands even further away. Unsurprisingly Yanmass is a city based on trade and providing vital services to caravans after their long treks across the continent, Yanmass plays host to caravans from across the known world.
Inside the walls on Yanmass, the population live in solid buildings, while a thriving community of traders often live outside the city proper. Depending on the time of year, the population of the city can triple, especially towards the end of summer.