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
Polonia Triangle depth report titled ""Wicker Park's Dirty Doorstep: Round two of the battle over the glorified bus stop known as the Polish Triangle"". Additionally, the Metropolitan Planning Council along with the Placemaking Movement and WPB (Wicker Park/ Bucktown) have jointly undertaken an initiative to redevelop and renovate Polonia Triangle. Polonia Triangle Polonia Triangle (), also known as the Polish Triangle, is located in West Town, in what had been the historical Polish Downtown area of Chicago. A single-tiered fountain made of black iron with a bowl about nine feet in diameter is installed at its center. Polonia Triangle derives its name