Many in America were outraged by Calley's sentence; Georgia's governor Jimmy Carter instituted "American Fighting Man's Day" and asked Georgians to drive for a week with their lights on.[6] Indiana's governor asked all state flags to be flown at half-staff for Calley, and Utah's and Mississippi's governors also disagreed with the verdict.[6] The Arkansas, Kansas, Texas, New Jersey, and South Carolina legislatures requested clemency for Calley.[6] Alabama's governor George Wallace visited Calley in the stockade and requested that Nixon pardon him. 79% of Americans polled disagreed with Calley's verdict.[6]
On April 1, 1971, only a day after Calley was sentenced, U.S. President Richard Nixon ordered him transferred from prison to house arrest at Fort Benning, pending appeal. This leniency was protested against by Melvin Laird, the Secretary of Defense. The prosecutor, Aubrey Daniel wrote, "The greatest tragedy of all will be if political expedience dictates the compromise of such a fundamental moral principle as the inherent unlawfulness of the murder of innocent persons."[7] On August 20, 1971, the convening authority — the Commanding General of Fort Benning — reduced Calley's sentence to 20 years. The Army Court of Military Review affirmed both the conviction and sentence (46 C.M.R. 1131 (1973)). The Secretary of the Army reviewed the sentence and findings and approved both, but in a separate clemency action commuted confinement to ten years. On May 3, 1974, President Nixon notified the Secretary that he had reviewed the case and determined he would take no further action in the matter.
Ultimately, Calley served only three and a half years of house arrest in his quarters at Fort Benning. He petitioned the federal district court for habeas corpus on February 11, 1974, which was granted on September 25, 1974, along with his immediate release, by federal judge J. Robert Elliott. Judge Elliott found that Calley's trial had been prejudiced by pretrial publicity, denial of subpoenas of certain defense witnesses, refusal of the United States House of Representatives to release testimony taken in executive session of its My Lai investigation, and inadequate notice of the charges. (The judge had released Calley on bail on February 27, 1974, but an appeals court reversed it and returned Calley to army custody on June 13, 1974.)
Calley was sent to the United States Disciplinary Barracks at Fort Leavenworth, Kansas. At his release, the press eagerly awaited his arrival at the prison's South Gate, as promised by the prison commandant. Instead, at Calley's request, he was released at West Gate and taken directly to the Fort Leavenworth airfield, where his escort, an unnamed Georgia Congressman, had him flown home. The press were notified of his departure after the fact, much to the chagrin of the major news network reporters from Kansas City.
The Army appealed against Judge Elliott's decision to the Fifth Circuit Court of Appeals and asked an appeals judge to stay Calley's immediate release, which was granted. However, the full Court upheld the release pending appeal and decided the entire court would hear the appeal (normally not done in the first instance). The Army won a reversal of Judge Elliott's habeas corpus grant and a reinstatement of the judgment of the courts martial, with 5 judges dissenting. (Calley v. Callaway, 519 F.2d 184, 9/10/1975). In a long and extremely detailed careful opinion, the reviewing court disagreed with Judge Elliott on the law and significantly on Elliott's scope of review of the courts martial proceedings. The Court noted that although by now Calley had been "paroled" from confinement by the Army, that did not moot the habeas corpus proceedings.
