根据提示完成填空。______________________ （与...结盟）the Comanches, they had ruled the whole of the southern Plains. War was their sacred business, and they were among the finest horsemen the world has ever known. But warfare for the Kiowas was preeminently _______________(性情使然) rather than of survival, and they never understood the grim, _______________ (无情的) advance of the U.S. Cavalry. When at last, divided and ill-provisioned(弹尽粮绝), they were ____________ (被驱赶到) the Staked Plains in the cold rains of autumn, they ____________ (陷入恐慌). In Palo Duro Canyon they abandoned their crucial stores to pillage(掠夺) and had nothing then but their lives. In order to save themselves, they ____________(向...投降) the soldiers at Fort Sill and _________（被囚禁在） the old stone corral(牲畜围栏) that now stands as a military museum. My grandmother was spared the humiliation of those high gray walls by eight or ten years, but she must have known from birth the affliction(痛苦) of defeat, the dark brooding(沉思) of old warriors.