The 1st Army is a major formation of the United States Army, established during World War I. It played a significant role in various battles, contributing to the Allied victory. The army has been involved in numerous conflicts since its inception, adapting to changing military needs over the decades. In addition to its historical significance, the 1st Army has a vital role in training and readiness. It oversees various training exercises and supports units across the country, ensuring that soldiers are prepared for deployment. The army continues to evolve, maintaining its importance in modern military operations.