The two generals are charged with war crimes against civilians committed during Medak Pocket Operation in September 1993. The International Criminal Tribunal for the former Yugoslavia (ICTY) referred the Ademi-Norac case to the Croatian judiciary in September 2005.
Ademi had been released pending trial, while Norac will arrive from the Lipovica penitentiary, where he is serving a 12-year sentence for war crimes against civilians in the central Croatian region of Gospic, given to him by Rijeka County Court in March 2003.
Thee hearings are scheduled to take place from Monday to Wednesday and then the trial should resume in July.
The trial will be held under tighter security measures so all those who wish to attend it will arrive through a special entrance gate and will not be allowed to bring cell phones in the courtroom.
The trial chamber is presided by judge Marin Mrcela. The trial will also be monitored by representatives of the Organisation for Security and Cooperation in Europe (OSCE), two HVIDRA branch offices and relatives of the defendants.
Reporters will be able to observe the trial from a press room.
Two largest court rooms were remodelled last year to fit the needs of this trial. Zagreb County State Prosecutor's Office proposed that 137 witnesses be heard, of whom 34 have the protected witness status. Members of the United Nations who arrived in the Medak Pocket region after the Croatian Army Operation, are also expected to take the witness stand. The judge will also hear some witnesses from Serbia.
Defence attorneys have announced they would proposed that some 100 people be heard as witnesses for the defence.