What is considered the oldest part of the Army?

• A. National Guard
• B. Regular Army
• C. Reserve Forces
• D. Army Corps of Engineers

Answer: (A)

The National Guard is recognized as the oldest part of the Army, with roots tracing back to the early colonial militias formed in the 1600s. These militias were established by the colonies for local defense and community protection, evolving over time into the National Guard as it is known today. This historical significance is paramount as the National Guard has played a critical role in American military history, being integral to both state and federal missions.

The Regular Army, while essential to U.S. military structure, was officially formed in 1784 after the Revolutionary War and therefore, is younger than the National Guard. The Reserve Forces, including the Army Reserve, were established much later, in the 20th century, following the need for a trained military reserve that could be mobilized in times of conflict. Similarly, the Army Corps of Engineers, while vital to military and civil projects, was formally established in the early 19th century and does not have the same historical lineage as the National Guard. This context helps clarify why the National Guard stands out as the oldest component of the Army.