A seemingly unnecessary raid made by men of the 10th Battalion A.I.F. on Celtic Wood, Broodseinde on the 9th October 1917 resulted in the unrecorded deaths of 37 of the raiding party. The mystery of how they died has never been solved. The conclusion reached in this book prompts thoughts as to why the military authorities never conducted an investigation at the time, and why the raid was planned in the first place.