My kid sister and I were both active duty during the Gulf War. My uncle, a Navy vet from the early 60s, told me he was stunned at the low casualties. He said they "were likely to have more killed during peacetime exercises in his time than the whole war did." He may have exaggerated this a bit, but it's still significant.
Probably a little exaggerated, but if one troop transport of the 60’s era crashed, that’s a lot of casualties. Even today, collisions seem to kill as many troops as enemy action, which shouldn’t surprise us, considering how many people die in traffic accidents in civilian life!