US ARMY "10th MOUNTAIN DIVISION" Challenge Coin with Case United We Stand. This is a great looking US ARMY 10th Mountain Division challenge coin. It has a 10th Mountain Division Patch in front of the gold plated background on the front side while the reverse side has a gold plated US Army logo. Coin has reeded edges and is about 1 9/16" in diameter. All details are raised lettering and gold plated. Coin is contained in an acrylic air tight holder and is displayed in an attractive black velvet presentation box which will make this a very impressive gift.. The 10th Mountain Division (Light Infantry) is a light infantry division in the United States Army based at Fort Drum, New York. Designated as a mountain warfare unit, the division is the only one of its size in the US military to receive intense specialized training for fighting in mountainous and arctic conditions. More recently, the 10th Mountain has been conducting operations in Iraq, advising and assisting Iraqi Security Forces. Originally activated as the 1oth Light Division (Alpine) in 1943, the division was redesignated the 10th Mountain Division in 1944 and fought in the mountains of Italy in some of the roughest terrain in World War II.