The acronym "ARNG" stands for Army National Guard, which refers to the reserve component of the United States Army. There are several synonyms for this term, including National Guard, Army Reserve, Militia, and State Guard. National Guard and Army Reserve are the most commonly used synonyms for ARNG. The National Guard is an organization that operates at both the state and federal levels and is composed of soldiers who have a dual role, serving their states during emergencies, and their country during times of war. Army Reserve soldiers are part-time soldiers who serve in a similar capacity to the ARNG, and are called into active duty when needed.