Final answer:
The responsibility for guard duty in army bases historically falls to a range of soldiers, often including volunteer forces, standing professional armies, enlisted military, and specific troops like Rome's legions or the Ottoman Empire's Janissaries. The U.S. Air National Guard exemplifies the modern embodiment of such forces with domestic guard duties.
Step-by-step explanation:
The soldiers who did most of the guard duty on army bases varied across different eras and regions. However, an overview of history shows some patterns. For instance, in early Rome, the army was a volunteer force where soldiers served a set term, often responsible for guarding bases amongst other duties. Additionally, troops like the Janissaries in the Ottoman Empire, who were an elite infantry corps, were particularly entrusted with guard duty as they served as the sultan's household guard.
In more recent times, national forces like the U.S. Air National Guard often assume responsibility for domestic guard duties. Those in the military hierarchy like the enlisted military are also often involved in guard duties. It is also notable that throughout history, volunteer forces and regular troops have played significant roles in base guard duties, such as the British 'pals' units during WWI.
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