The 4th Infantry Division ("Ivy 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.The 4th Infantry Division was organized at Camp Greene, North Carolina on 10 December 1917 under the command of Maj. Gen. George H. Cameron. It was here they adopted their distinctive insignia, the four ivy leaves. The ivy leaf came from the Roman numerals for four (IV) and signified their motto “Steadfast and Loyal”. The division was organized as part of the United States buildup following the Declaration of War on 6 April 1917 and the entry of the United States into the war on the side of the British and French.