Field of battle for the second fight between Sancho and Alfonso, beside the river Carrion.
Nevertheless the power of King Don Alfonso was not yet destroyed, and he would not yield up his kingdom: and he sent to his brother a second time to bid him battle, saying that whosoever conquered should then certainly remain King of Leon; and the place appointed was at Vulpegera, beside the river Carrion.
The Leonese lodged themselves in Vulpegera, taking no thought of their enemies, and setting no watch; and Ruydiez arose betimes in the morning and fell upon them, and subdued them before they could take their arms.