Rio Grande (1950)

Lt. Col. Kirby Yorke is posted on the Texas frontier to defend settlers against depredations of marauding Apaches. Col. Yorke is under considerable stress by a serious shortage of troops of his command. Tension is added when Yorke's son (whom he hasn't seen in fifteen years), Trooper Jeff Yorke, is one of 18 recruits sent to the regiment.

Rio Grande keeps every mind human — it fights its subject at zero distance. The story fights on E8/E9/E11 of the E0–E14 reality ladder.