The Bug Wars by Robert Asprin

I continued to study the ruin. After several thoughtful moments, I was ready.

“It is obvious that the city and probably its inhabitants were destroyed in an attack. There is evidence in the ruins of attack from above and below as well as at a ground level. This indicates an organized, concerted attack controlled by intelligence. If there is no local weapons technology, it was not the result of a civil war, but rather the attack of an outside force.”

I paused and watched the table for a few more moments.

“The extent of the damage would indicate a mechanized attack; however, there are signs that this assumption would not explain. Here is a building with the front partially ripped off. I say specifically ripped off rather than blown off. Notice the machinery in the interior of this room remains undisturbed, which would indicate the absence of an explosion. The portion of machinery toward the front, apparently of similar design and material as that in the rear, has been sheared off even with the breach in the wall. From this I would conclude that the limited extent of the damage is due not to the nature of the machinery, but rather the limited, nonexplosive, nonchemical nature of the attack.”

I took over control of the table to enlarge a specific portion of the view.

“The key thing to note is the nature of the breach. As I said, the fact that this portion of the wall was ripped out would indicate a mechanical attack, yet the scars on the wall resemble those marks left by the jaws of a beast rather than a machine.”