They had been formed by an offshoot of the Sak’tok River north of Tjarlas and had cut eastward across the fluvial plain, digging channels into the soil which over the years resulted in a jagged series of shallow ravines running north to south nearly five miles to the east of the city. They were, for the most part, capped by vertical cliffs of soil, their steep sides made slippery by the gravel and sand. There were exits from the Rills; steep, narrow ravines that led back up onto the plains, but only a few of these were passable. The Rills were tempestuously dangerous, prone to flooding during the late season rains which frequented the Chaenandrian regions of the Southern Steppes. They had three primary virtues, Drakis mused as he stood on a slope just below the crest of the Rills. They were a fine place for a fold if you wanted to keep your arrival secret; they were an excellent place to hide your army if you wanted to remain undetected; and they were within an easy march to lay siege to his prize.
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