The 1st Infantry Division, also known as "The Big Red One," is one of the oldest and most distinguished divisions in the United States Army. Established in 1917, it has played a significant role in major conflicts, including both World Wars, the Vietnam War, and more recent operations in Iraq and Afghanistan. The division is known for its distinctive shoulder patch featuring a large red numeral one. Headquartered at Fort Riley in Kansas, the 1st Infantry Division is composed of various brigades and support units. Its mission includes training soldiers, conducting operations, and providing support in various military engagements. The division's history reflects a commitment to service and excellence in the U.S. military.