Basic training in '70. We were issued overshoes which were tied on the top of our packs. In spite of getting a lot of rain, we put them on exactly 1 time - after we'd been out in the mud for several hours and were soaked up to our necks. They were nothing but added weight in our packs to get us in shape. For that matter, after 50 years, they are the only thing I can remember that was in our packs. I don't remember what else was in there.