WASHINGTON — Pfc. Bradley Manning will be sentenced Wednesday morning for providing more than 700,000 secret government documents to WikiLeaks, the largest leak of confidential materials in American history, the judge announced Tuesday, just hours after beginning deliberations.

Private Manning, 25, faces up to 90 years in prison, although he will be credited for the more than three years he has already spent in custody. There is no minimum sentence. The judge, Col. Denise R. Lind, convicted him in July of most of the charges, including six counts of violating the Espionage Act of 1917.

The sentencing is scheduled for 10 a.m., and the hearing is expected to be brief. Colonel Lind will announce Private Manning’s full sentence, and she is expected to then adjourn the court-martial. Under the military justice system, she does not have to break down the sentence by charge or explain her reasoning, and Private Manning is not expected to make a statement.

Private Manning’s sentence will automatically be sent to the Army Court of Criminal Appeals, unless he unexpectedly decides to waive that right.