By now, Walkyr’s army had been driven clear back to Rainbow Waters’ Ferey River Line. It had lost contact with St. Vyrdyn—which the heretics had entered yesterday, if Rainbow Waters’ latest intelligence was correct—but its right flank continued to cling to the edge of the Tairohn Hills sixty or seventy miles north of the city.
Weber, David. At the Sign of Triumph (Safehold) (p. 699). Tom Doherty Associates. Kindle Edition.
Unless I'm mistaken the right wing of any Church army would be it's towards the SOUTH, so how can their right be towards their north?