The Adobe Walls trading post was on the Canadian River, another Red River tributary.

The battle sites of the Red River War are scattered through the Red River’s tributary system.

This geographic concentration is not coincidental.

The Red River drainage was the core of the Southern Plains peoples’ territory — the country where the Comanche had been most powerful, where the Kiowa ranged most consistently, where the Southern Cheyenne had settled after their displacement from the northern Plains.

The Red River War was a war for control of this specific geography, fought out across the canyons and tributaries that fed the river.