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In page Valens:

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Meanwhile, troubles broke out with the boy-king Pap, who purportedly had the Armenian patriarch Nerses assassinated and demanded control of a number of Roman cities, including Edessa. Controversy also ensued over the issue of the appointment of a new patriarch of Armenia, with Pap appointing a candidate without the traditional approval from Caesarea. Pressed by his generals and fearing that Pap would defect to the Persians, Valens made an unsuccessful attempt to capture the prince and later had him executed inside Armenia. In his stead, Valens imposed another Arsacid, Varazdat, who ruled under the regency of the sparapet Mushegh Mamikonian, a friend of Rome.[citation needed]