You would be amazed what armys bury.
I have heard many stories of all kinds of gear being buried when armies thought they were going to be over run. Every thing from guns to mortars to you name it. If it could not be buried them it was thrown in a pile and had thermite or diesel poured and lit.
It is a case of load all you can and bury or destroy all you can because the tanks and infantry are 2 hours away and we are about to be cut off.
They are still digging stuff up from WWI. I saw a story in europe where they found a BIG pile of gear buried in the back of a barn by the resistance.