[L,TOWM]

Or pump in an overkill amount of aerosol vomiting agent into any found tunnel...

[Mogger]

One day, when visiting a farmer friend in another town, I asked why and how several of his windows were broken, siding damaged and rocks all over the place. ,

There had been a family of woodchucks making holes in his field along a stone wall and under the wall, as well as feasting on his garden.

He could never get a shot at them. One day, he had enough.

Gas was cheaper then. He poured a 5 gallon can of it in the holes and lit it off. Lucky it didn't send him to heaven along with the chucks. The gas had run down the holes under he wall. When it blew, the rocks became like a giant fragmentation grenade.

His cows and what was left of his garden and were now safe, and he had some windows to fix.

[Bookshelf]

You state, “Or pump in an overkill amount of aerosol vomiting agent into any found tunnel...” I believe that is what the ‘Tunnel Rats’ did to eliminate tunneling in III Corps near Saigon.