1. A large series of fractures of the calcaneus of a distinct type has been presented.
2. The fractures are of an insufficiency type, found for the most part in older soldiers who are inadequate physically and structurally, and who frequently have inadequate personalities.
3. The fractures are not demonstrated by roentgenograms until the healing stage.
4. The fractures are of importance only for the temporary disability that they produce.
5. Recognition is important, to avoid the physical punishment to the individual of continuing full duty.
6. Treatment is simple, and consists of avoidance of weight-bearing until the fracture has healed.