Challenge Coin U.S. ARMY 2nd Infantry Division Commemorative Coin

The 2nd Infantry Division Challenge Coin is an official product licensed by the United States Army, part of the Patriotic Collector's Series.

The 2nd Infantry Division ("Indianhead"; "2ID," "2nd ID", or "Second D") is a formation of the United States Army. Its current primary mission is the pre-emptive defense of South Korea in the event of an invasion from North Korea. There are approximately 17,000 soldiers in the 2nd Infantry Division, with 10,000 of them stationed in South Korea, accounting for about 35% of the United States Forces Korea personnel.

The 2nd Infantry Division is unique in that it is the only U.S. Army division that is made up partially of South Korean soldiers, called KATUSAs (Korean Augmentation to the U.S. Army). This program began in 1950. Some 27,000 KATUSAs served with the U.S. forces at the end of the Korean War. As of May 2006, approximately 1,100 KATUSA soldiers serve with the 2ID.

The 2nd Infantry Division has a unique and perplexing structure. There are brigades stationed in both the Republic of Korea and at Joint Base Lewis–McChord, Washington that wear the "Indianhead" shoulder sleeve insignia (SSI). However, the 2ID commander only exercises command over the Korea-stationed units, which includes the combat aviation brigade, the sustainment brigade, the attached 210th Field Artillery Brigade, and the rotational armored BCT (brigade combat team) from the U.S.