Jury selection is expected to begin Tuesday afternoon in the Fort Hood shooting trial.
Major Nidal Hasan is set to represent himself when court-martial proceedings get underway at 2:30 p.m.
Hasan is accused of open firing in a Fort Hood building on November 5, 2009.
During the rampage, 13 people were killed and nearly three dozen were wounded.
The judge overseeing the court-martial, Col. Tara Osborn, said she expects jury selection to last a month. Testimony is expected to start in August.
Hasan and military prosecutors will choose from 150 officers from Army posts around the country as they seat the jury, Col. Osborn's office said.
If a jury of his peers convicts him, Hasan could be put to death or sentenced to live without parole.