Surpmil ~ The Germans were given a field day with the stores left behind just like at Dieppe where the Churchill tanks were left behind for them to evaluate.
When they leave the rifle as a marker they would normally render it by ditching the bolt or mechanism my faded memory has Tom Hanks rendering a Garandmarker after they buried their medic.
Material loss is probably scaled into the big scheme of things but Dunkirk was not one of them and without operation Dynamo aided by the RAF* fighters coupled to Herr H*tlers reluctance to attack Englandwe have probably been spared a 1000 years of blackness.
*Conjecture there as allot of soldiers thought they had been abandoned by the air force they had not as the RAF fighters were stopping the GermanLuftwaffe inland from the beach.
Just a side note when I buy books for my collection I try as much as possible to get first Ed's $'s pending, as I feel that history written closer to the event is more likely to be less inclined with embellishments from the fog of time.
If I am in doubt with information I will consult my books and try to find the relevant information because it is a very brave soul that puts conjecture to a sources information when that source was there at the time doing it or trying to survive it and not a re-write of the original text or data by some one who found a lost document that the cook threw out.
Besides Daisy is dead and well loosing her shape...........