In the Birthright setting, Goblins are all one race and come in three different sizes, with the sizes corresponding to Goblins, Hobgoblins and Bugbears. The diety for the Goblins on Cerilia, Kartathok is stated to be very similar to Maglubiyet, and so the mix of forces (and their numbers) does fit the idea of them being created as an ideal army.
They are one of the three major monstrous races in that setting, with the Orogs and the Gnolls the other two, and the most organized, with the Gnolls being a rabble, and the Orogs in between the Goblins and Gnolls in terms of organization.