Iron Brigade and was previously called the "Black Hat" Brigade. The 3rd Brigade Combat Team, 1st Infantry Division was known as the Iron Brigade from its formation in 1917 through World War I, World War II and Vietnam, until some time in the early 2000s when, for reasons that are still unclear, the name was changed to Duke Brigade. The unit crest was an Iron Cross in a triangle, it appears that that was also changed. The 3rd Brigade of the 4th Infantry Division is also known as the Iron Brigade. Its unit crest is similar to the medals issued to veterans
Iron Triangle of Health Care has not yet been disrupted like fields such as computer production. The belief is that with time and innovation, the current Iron Triangle will be disrupted, and just as the cost of computer production has fallen as quality and access to computers has increased, health care access and quality will rise, and cost will decrease. Critics argue that the Iron Triangle is not a one-size-fits-all model that can be applied to an entire population. Iron Triangle of Health Care The concept of the Iron Triangle of Health Care was first introduced in William Kissick’s book, "Medicine’s Dilemmas: Infinite Needs Versus