Shelby's Iron Brigade 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 of the both Western and the Eastern
Iron Triangle of Health Care care system. Critics of the Iron Triangle state that the model is not actually as rigid as its name indicates, but is more dynamic because costs of care are constantly changing. Health care costs change faster than the other two dimensions of the triangle, affecting access to care, which in turn influences quality. Other skeptics argue that the Iron Triangle is not a fixed framework, but an observation and reflection of the current state of health care. In line with Clayton Christensen’s theory on disruptive innovation, critics of the Iron Triangle believe that health care, particularly in the United States,