Manning is the whistleblower who revealed classified military information on the waging of the war in Iraq. This information included clear evidence of war crimes.
Manning contravened US military law. He also was acting in keeping with the Nuremburg laws; laws that were enshrined at the end of World War Two after the sacrifice of millions of Allied soldiers and civilians. He is currently being held in extraordinary circumstances in the brig, and, effectively, tortured. He is being denied a fair trail.