"The Defenders" by Philip K. Dick is a science fiction novelette published in 1953. Eight years after nuclear war forced humanity underground, sophisticated robots called "leadys" continue fighting on the devastated surface. When investigators discover a non-radioactive robot, war planner Taylor leads an expedition topside to uncover the truth. What they find challenges everything humans believe about the war and their mechanical servants' loyalty. The story explores deception, rationality, and whether machines might understand peace better than their creators. (This is an automatically generated summary.)