Manning, 25, on Tuesday escaped a life sentence with no parole at his court-martial when Judge Colonel Denise Lind acquitted him of aiding the enemy, the most serious of 21 criminal counts against him. But he still faces the possibility of 136 years in prison on 19 other charges.
The slightly built Army private first class was working as a low-level intelligence analyst in Baghdad in 2010 when he was arrested and charged in the biggest leak of classified information in U.S. history - a trove of 700,000 battlefield videos, diplomatic cables and other files.
Following Tuesday's verdict, the court-martial at Fort Meade, Maryland, moved into the sentencing proceeding on Wednesday with arguments by military prosecutors and Manning's lawyers.
A prosecutor, Major Ashden Fein, said Manning's leaks "have impacted the entire system" for granting defense analysts access
to classified information.
Manning's attorneys were expected argue that the Army private was not trying to jeopardize US national security.
He did not testify during his trial or during the first day of his
sentencing hearing.
The first prosecution witness, retired Brigadier General Robert Carr, said that allowing young analysts such as Manning to have access to classified information was "hugely important" to the US military.
In a court martial that stretched over two months, military prosecutors had argued that Manning became a "traitor" to his country when he handed over files to the anti-secrecy WikiLeaks website.
The US government charged that the breach put national security at risk. It also thrust WikiLeaks and its founder Julian Assange into the international spotlight.
Manning supporters who gathered at Fort Meade on Tuesday said they were relieved he had been acquitted of the most serious charge, but thought the sentence he could face was excessive.
"The remaining charges against him are still tantamount to life in prison," said Nathan Fuller. "That's still an outrage."
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ