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
Battle of the Iron Triangle along Route 14 until 24 November. Measured against the costs and violence of the earlier phases of the campaign, this final chapter was anticlimactic. Casualties on both sides were light, and contacts were few and of short duration. The PAVN had given up its last foothold in the Iron Triangle with only token resistance in order to replace losses, reorganize, re-equip and retrain the main forces of the new 301st Corps for the decisive battles to come. The drawn out fighting over the small battlefield of the Iron Triangle while ending in South Vietnamese victory showed that the North Vietnamese