TL15 devices, a few still in working order, can be found, especially in the Underworld. T kumel is a hot planet. Temperatures in the inhabited temperate zone are similar to Earth's equatorial zone. The density of the planet is relatively low, making metals, especially iron, in short supply. Humans have adapted to this with the use of chl n hide, an animal hide chemically treated by the armorer's clan to form a lightweight substance with the hardness of bronze.
Most merchant caravans use slave bearers, trained to carry large loads on their backs.
Armies have no cavalry, relying on foot soldiers.