The 4th Infantry Division is a modular division of the United States Army based at Fort Carson, Colorado, with four brigade combat teams. It is a very technically advanced combat division in the U.S. Army. The division has two nicknames; the first, "Ivy," is a play on words of the Roman numeral IV or 4. Ivy leaves also symbolize tenacity and fidelity which is the basis of the division's motto: "Steadfast and Loyal". The second nickname, "Iron Horse", has been recently adopted to indicate the speed and power of the division.