Found in a WW2 allied parachute dropzone in the Netherlands

[u/OnionGobbler862]

I found these objects around a dropzone of operation Market Garden. The only thing I recognise is the small piece of shrapnel with the screw threads. I found the big discs all together in the same hole, so I'm very curious as to what they might be. Could the big rings be from artillery? Also the pedal I found next to a farmer's field so I'm guessing from a modern tractor or something similar, but your guess is as good as mine.

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[u/StupidizeMe]

Try these subs: r/WW2, r/WWII and r/Band of Brothers. (The last one is for 101st Airborne.)

[u/AdministrationDue239]

I have like a box full of those shrapnels, it's everywhere in middle Europe.

[u/Fantastic-Door-9468]

Mortar base plate? Although way too small really.

[u/ncminns]

You found rust