Re:Delivery vehicles (Score 1)

It's worth remembering that one of the most asymmetric military actions of WW2 was a French resistance girl who visited a German tank base on her bicycle, wandered around putting grease loaded with carborundum into track bearings, and disabled a battalion, riding off home again for lunch.

Actually, it was a pair of French "girls", and they sabotaged the grease reservoirs of railway cars that the tanks were being transported upon. This was called "hot boxing" because it caused the bearings to overheat and fail. The tanks were unaffected, though because they were not able to move via rail, they subsequently suffered significant casualties as a result of allied harassment during their (much slowed) maneuvers.

In modern analysis, the material losses suffered from hot boxing seems to have been negligible and the psychological result (on both friendly and enemy forces) seems to have been the most significant impact. In fact, the SOE wasn't even able to reproduce bearing failure when testing the technique in laboratory conditions, though their test railway was not transporting cargo as heavy as tanks...