[dp_burke]

Been watching this thread with interest to see if the names of the dead men might be found.

The mention above of the men being 'negro' then suggests that we are probably not looking for combat soldiers, perhaps an engineering or other support unit since the 92nd Infantry Division was only entering the line at that stage. But I guess this makes it a little more likely that they were 92nd Inf Div.
If up to nine men were killed, there is some chance that at least one or more still is buried in Italy, some of their family may have chosen to have them remain buried in Italy.

With this in mind, ancestry.com allows us to look at the Italian burials for those died those dates:
31 July in Florence American Cemetery Only

John Chioda Sgt 39th Engineer Combat Regiment 33271457
Fred A Hall Cpl 4064th Quarter Master Service Company 34744224
Rafael Y Mylly, F/O 522 FS/ 27 FG T-123202
Frank Nelson, PFC, 362 Inf Reg / 91 Inf Div 39704979

The NARA AAD enlistment records do show that Fred A Hall was a "Negro" enlistment. All the others were "white" enlistment.

The 1st August includes these names

Frank J. Bertino Pvt 362 Inf Reg / 91 Inf Div W
John L. Carter 717 BS / 449 BG Assumed to be non-negro
William A. Schreier PVC 362 Inf Reg / 91 Inf Div W
Nolen C. Skipworth Pvt 435th AAA Btn No enlistment record found, but confirmed from rosters of the dead that he was White.
Noel Sonnichsen 87th FS / 79th FG W
Joseph O. Van Osdol PFC 362 Inf Reg / 91 Inf Div 37620533 W

All the above are non-negro

Not really anything conclusive there to be honest, the fact that you found infantry weapon parts at the scene, maybe this was a transport of 92nd Infantry Division soldiers on their way to the front.

It is such a pity that the US does not have a proper listing of their war dead similar to the British CWGC. The US Roster of World War Two dead, also on ancestry.com do not include dates, not even a year of death. If we could determine that 92nd Inf Div troops were brought up to the front by aircraft it might be a lead. There will be 92nd Inf Div associations out there, they must have records.