IMO, it doesn't violate the rules. Physically, the Cyclops and Gold units were guarding the same passage. Mountains were simply generated, which are now part of the desert landscape. But along the border of the stones, they are guarding the same passage. And by defeating one of them (the dragons), the player entered the zone.
P.S. It's strange that after killing the Gold units, they became afraid of the Knights :confused:
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