Horde Troopers are foot soldiers of the Horde Empire. Although each trooper is individually unremarkable, in large numbers they are used to great effect in the occupation of Etheria by Hordak. Vast armies of Horde Troopers were also used during the Horde's failed invasion of Eternia.
It is unclear whether Horde Troopers are humanoids wearing bulky armor, or robots. In their appearances in most media, the troopers are explicitly robots, so as to demonstrate the toy's "self-destruct" feature. However, some episodes of She-Ra: Princess of Power have depicted them with names and feelings, treating them as bullies who enjoy tormenting innocents and fear Hordak's disapproval; this behavior may be considered as unusual for machines, but actually, partially-emotional robots exists in the He-Man universe. Writers for the series presumably used whichever form was most convenient; expendable machines could be defeated more dramatically, whereas living people or high-level artificial intellect could be given more natural dialogue.