Regular Army (United States)
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The Regular Army of the United States succeeded the Continental Army as the country's permanent, professional land-based military force. In modern times, the professional core of the United States Arm
World War II-era poster advertising a career in the Regular Army
United States Volunteers
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United States Volunteers were military volunteers called upon during wartime to help the United States Army. They were separate from the Regular Army and the militia.
Regular Army (United States)
…called the Regular Army (often abbreviated as "RA"). From the time of the American Revolution until after the Spanish–American War, state militias and volunteer regiments organized by the states (but thereafter controlled by federal authorities and federal generals in time of war) supported the smaller Regular…
The 50th Regiment Pennsylvania Volunteer Infantry in Gettysburg, Pennsylvania, in July 1865
U.S. Volunteers in Saltillo, 1847
Monument to the 11th Pennsylvania Infantry Regiment, located in Gettysburg National Military Park
Statue of "The Volunteer" in Marlborough, Massachusetts, honoring local men who fought in the Spanish–American War