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During the reign of Constantius II , the Sarmatian chieftains were defeated by a slave revolt and fled to the Victohali for protection , as Ammianus Marcellinus writes : And these native chiefs , losing all their wisdom in their fear , fled to the Victohali , whose settlements were at a great distance , thinking it better in the choice of evils to become subject to their protectors than slaves to their own slaves .
 Constantius II, Ammianus Marcellinus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Constantius II, Ammianus Marcellinus