Mehmed was initially known to be opposed to the war with Persia, which began in 1578, but was overruled upon eventually, amongst one of the reasons being the constant urgings by Sokollu Mehmed to take advantage of the Ottomans neighboring rival. Sultan Murad III time afterwards, began to limit his Grand Vizier's powers by slowly removing his allies from high offices. The state secretary Feridun, an old companion of Sokollu mehmed's since the siege of Szigetvár, was sent to Belgrade, away from Constantinople. Mehmed's faithful Arab friend, the Governor-General of Cyprus, was lynched by mutinous soldiers. Mehmed's greatest rivals, Hamid Efendi and Piyale Pasha, arranged the execution of the Grand Vizier's Greek protege, Michael Kantakouzenos. On 10 October 1578, Sokollu Mustafa Bey, Sokollu Mehmed Pasha's nephew and Governor-General of Budin, was assassinated. On the anniversary of this day, on 10 October 1579, Sokollu Mehmed had his servant Hasan Bey read to him about the Battle of Kosovo.