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
Operation Iron Triangle be convicted of aggravated assault and to receive a nine-month prison sentence in exchange for his testifying against three other members of his squad." 3. http://www.armytimes.com/news/2008/12/army_sgtstaffsgt_120308w/ Raffi Khatchadourian (2009), "THE KILL COMPANY: Did a colonel’s fiery rhetoric set the conditions for a massacre?" The New Yorker July 6 &13 2009 issue. Operation Iron Triangle Operation Iron Triangle was a military operation in the Iraq War. The operation was led by Michael D. Steele in 2006. The operation targeted a suspected al-Qaeda in Iraq training facility southwest of the city of Samarra near the Muthana Chemical Complex south of Lake Tharthar.