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
Triangle (musical instrument) can also be modulated slightly by varying the area struck and by more subtle damping. The triangle (known in Cajun French as a ‘tit-fer, from "petit fer", "little iron") is popular in Cajun music where it serves as the strong beat, especially if no drums are present. In the Brazilian music style Forró it used together with the zabumba (a larger drum) and an accordion. It forms together with the zabumba the rhythmic section. It provides usually an ongoing pulse, damping the tone on the first second and fourth while opening the hand on the third beat to let most