45th Infantry Division

The 45th Infantry Division, also known as the Thunderbird Division, is both a fighting unit in the book’s World War II narrative and the setting for a decisive part of Frank Sheeran’s formation as a soldier. Sheeran served as an infantry rifleman and recorded 411 days in combat. The division’s exceptionally heavy casualties and prolonged exposure to the front line make his service more than a brief wartime episode: the book connects it to his later capacity for violence and to the emotional hardening he describes.

Assignment and Composition

Sheeran sailed for Casablanca on July 14, 1943, assigned to the 45th Infantry Division as a rifleman. A soldier could not choose a division, but could request a company if there was an opening. Sheeran asked for the company that included his longtime friend Diggsy, whom he knew from Philadelphia, and joined the same squad. The account gives the scale of the unit at several levels: a company numbered about 120 men, a platoon about thirty-two, and a squad eight. That personal choice placed Sheeran among familiar companions, though the book later emphasizes how precarious closeness became under repeated combat losses.

The division’s operational record is also presented through the official 202-page Combat Report, issued within months of the war’s end. Sheeran tracked down the report to help explain his service, and the author reads it alongside his recollections. The report records 21,899 battle casualties. Since a fully staffed division numbered about 15,000, its losses were not an abstract total: the book describes replacements arriving and being carried out day after day. The division’s history thus supplies a collective measure of attrition against which Sheeran’s individual account can be read.

Combat Record and Military Culture

The Combat Report gives the division 511 days of combat: days spent shooting and being shot at on the front lines. Sheeran’s own Army record credited him with 411 combat days, more than four-fifths of that divisional total, with rest and rehabilitation periods along the way. The contrast between the ordinary veteran’s roughly eighty days of actual combat, as described in the book, and Sheeran’s 411 underscores the unusual duration of his exposure. He was never hit by German bullets or shrapnel, but survival did not mean freedom from consequence. The author interprets the repeated experience of killing, maiming, and anticipating death as conditioning Sheeran for the rest of his life.

The division’s culture is also framed through the commands and expectations associated with General George S. Patton. In an address to its young soldiers before deployment, Patton described a role centered on killing the enemy and discouraged treating prisoners as a burden to be taken. The book connects that rhetoric to the division’s reputation and to the moral atmosphere in which its men fought. It does not present military discipline as a simple barrier against violence: Sheeran’s account instead places official authority, battlefield practice, and the conduct of individual soldiers in uneasy proximity.

Biscari and the Killing of Prisoners

The book recounts the Biscari killings after the battle for the airfield in Sicily on July 14, 1943. In Sheeran’s recollection, Diggsy told him that American soldiers had been hit by snipers and that, after about forty Italian soldiers surrendered, the Americans could not identify which men had been responsible. The prisoners were lined up and shot. Sheeran also recalled being told that a sergeant later took about thirty prisoners behind the line, seized a machine gun, and killed them. The account is significant not as a scene Sheeran says he witnessed, but as a story he says reached him from a close friend and shaped his thinking about surrender and survival.

The book separately identifies two members of the division who faced courts-martial for murder in connection with the same day’s battle. Captain John T. Compton had ordered a firing squad to shoot approximately forty unarmed prisoners of war, including two civilians; Sergeant Horace T. West had personally machine-gunned thirty-six unarmed prisoners. These documented proceedings give institutional specificity to the violence described in Sheeran’s account. They also complicate the division’s public praise: after its success in Sicily, Patton lauded it as one of the best divisions in American military history, while two of its soldiers faced charges arising from the killing of prisoners.

The tension deepens in the book’s account of Patton’s response. In a diary entry dated the day after the killings, Patton recorded being told that a captain from the 45th’s 180th Regimental Combat Team had shot prisoners in cold blood. He called it an error likely to provoke press attention and anger civilians, and directed that the officer be told to certify that the dead men were snipers or had tried to escape. The passage places the abuse of prisoners alongside the command’s concern about public exposure, rather than treating the crimes as isolated from the military culture surrounding them.

Monte Cassino, Anzio, and the Long Front

Before Anzio, the 45th had endured seventy-two days of continuous combat at Monte Cassino under extreme conditions, including bitter cold, wet weather, and nearly constant artillery and mortar fire. After repeated, costly Allied attacks against the monastery failed, the division was withdrawn to open a front on the German flank through the amphibious landing at Anzio. In the book’s telling, moving the soldiers away from one sustained ordeal did not bring respite; Anzio became another prolonged test.

The Allied landing initially surprised the Germans, and the troops took a couple of hundred prisoners. But the advance paused while the commanding general waited for tanks and artillery. The delay gave German forces time to bring their own tanks and artillery into position and dig in above the beachhead. The division then helped repel German attempts to erase that beachhead, according to its Combat Report, before enduring months of holding and waiting under bombardment. More than 6,000 Allied lives were lost during this period. In May, the main force broke through at Monte Cassino; by the end of the month, 150,000 exhausted soldiers moved out of their Anzio dugouts and linked up with forces advancing from the south toward Rome.

Significance in Sheeran’s Story

For the book, the 45th Infantry Division is not merely a service record or a backdrop to later events. Its numbers and battle sequence give scale to Sheeran’s account: 411 personal combat days set within 511 divisional days, and a division’s 21,899 casualties behind the repeated replacement of individual soldiers. The author says that eliciting these memories was among the most difficult parts of the interviews; two years passed before Sheeran could accept that his combat experience was worth discussing. His account therefore reaches the reader slowly, through both a veteran’s recollections and the official report he sought out to support them.

The division’s narrative importance lies in the connection the book draws between wartime exposure and Sheeran’s later life. The author argues that prolonged combat taught him to kill in cold blood, while Sheeran describes learning to survive and becoming less willing to grow close to people who might soon die. The division’s history cannot, by itself, explain the choices Sheeran made afterward. In the book, however, its casualty record, battlefield violence, and months of sustained danger establish the formative conditions through which those choices are examined.