World War II soldiers joined for the duration. A soldier may have come into combat as an individual replacement, but he knew that he would be with his unit for the rest of the war. He was very invested in establishing himself with his newfound unit, and those who were already in the unit had equal cause to bond with this individual, who they knew would be their comrade until the war was over. These individuals developed very mature, fulfilling relationships that for most of them have lasted throughout their lives.
