In World War II, the Allied forces sabotaged German factories that made these round metal spheres. These were basically used in all German cars and other vehicles. Their destruction meant that the Germans could not repair the vehicles used in the war.
Military sabotage is really different than any other. It has a lot of strategic decisions involved and can make a big difference in a war. The Allied forces attacked those specific factories because it was not something the Germans would think of protecting, and sabotaging it would weaken their position in the war. I think this is called "attacking the weakest link" in defense language. A military sabotage isn't done on the enemy's strong point, it's done on their weakest. And military sabotage should not overdo it. It should use the least amount of force necessary to complete the job and no more than that.