Many female workers at Ravensbrück concentration were forced to produce army uniforms for the Nazis. They deliberately sabotaged them. An example of this is that they made the heels of socks too narrow or defective. This gave soldiers painful blisters on their feet. The OSS (WW2 version of CIA basically) actually produced pamphlets encouraging simple sabotage. These were meant to be dispersed to labor and management within target countries. To do things like “sew one pant leg shorter than another” and to put “metal shavings in oil/gas tanks” among many many other suggestions. Even telling factory managers to simply “lose” important documents.