Strife then arose between the committee and the Liberal Union, a body which mainly represented the Christian electorate, and on the 5th of April Hassan Fehmi Effendi, who edited the Serbesti, the official organ of the union, was assassinated.
The mosque of Sidi Ahmed bel Hassan, usually called Abul Hassan, built A.D.
The power of the Ottomans at sea was maintained during this period by a series of notable captains, such as Khair-ed-din and his son Hassan, Piale, Torgud, Sali Reis and Pin Reis.
In June 1593, with an army of 30,000 men, he laid siege to Sissek; the Austrian and Hungarian levies hurried to its relief; and on the 22nd the Turks were routed with immense slaughter on the banks of the Kulpa, Hassan himself, with many other beys and two of the imperial princes, being among the slain.
In August 1602 Szekesfehervar again fell into the hands of the Turks; in November the siege of Buda by the archduke Matthias, who had taken Pest by storm, was raised by the grand vizier Hassan.