After scouting the area of the left flank as ordered, Captain Benteen received a note from his superior officer George Armstrong Custer ordering him to quickly bring up the ammunition packs and join him in Custer's surprise attack on a large Native American encampment. Benteen's failure to promptly comply with Custer's orders is one of the most controversial aspects of the famed battle. The fight resulted in the death of Custer and the complete annihilation of the five companies of cavalrymen which comprised Custer's detachment, but Benteen's relief of Major Marcus Reno's battalion may have saved them from annihilation.