Changes

Warfare has been a constant throughout human history and conflict can certainly be traced back to our hominid ancestors in our evolutionary past. While technology today is often used as the distinguishing characteristic of warfare, the development of the professional army, that is fulltime soldiers and formations of a standing army, was also an important factor in making warfare an affair conducted throughout the year and allowed the establishment of large-scale states and empires to be possible.<ref>For general information about the history of war and armies, see: Chaliand, Gérard, ed. 1994. ''The Art of War in World History: From Antiquity to the Nuclear Age''. Berkeley: University of California Press.</ref> This also paved the way for early states and empires to compete more with each other, helping to develop a variety of other social and technical innovations, including shaping our own world.

In early warfare, from what we can tell when textual sources first become available to us at around the 3rd millennium BC, men would be conscripted for specific campaigns or years when kings were fighting neighboring kingdoms, where the conscripted soldiers would not be required to serve for very long periods and would simply return to their previous employment/professions after the campaign would finish.<ref>For information about early conscription in warfare in city-states, see: Trigger, Bruce G. 2007. ''Understanding Early Civilizations: A Comparative Study''. 1. paperback ed. Cambridge: Cambridge Univ. Press.</ref>By the mid 3rd millennium BC, there were attempts to create standing armies of professional soldiers.<ref>For information on early professional armies in Mesopotamia, see Bauer, S. Wise. 2007. The History of the Ancient World: From the Earliest Accounts to the Fall of Rome. 1st ed. New York: W.W. Norton, pg. 167.</ref>The Akkadian army was one of the first empires and its constant state of warfare in the early period of its first king, Sargon, required soldiers to be constantly campaigning rather than fighting on only a temporary basis (Figure 1).<ref> For information about the Akkadian Empire, starting from Sargon and his likely military developments, see: Spielvogel, Jackson J. 2015. ''Western Civilization''. Ninth edition. Stamford, CT: Cengage Learning, pg. 13. </ref>

Another early king we know who attempted to make a professional army was Shulgi (c. 2094-2047 BC), a king who ruled the empire of Ur (the so-called Ur III Empire). <ref> For information on Shulgi and his reforms, including related to the military, see: Foster, Benjamin R. 2015. ''The Age of Agade: Inventing Empire in Ancient Mesopotamia''. New York, NY: Routledge.</ref> While it is not clear what he did exactly, he did make the army more professional, full-time, permanent, and was a force that could easily called upon as needed. This suggests that the army now consisted of soldiers who were strictly employed as professional soldiers rather than having other occupations, although the details of how this was done and the extent of this are not very clear.

While these early armies may be considered professional and represent transformations in how warfare was conducted with standing armies, it was not until key reforms under the Neo-Assyrian Empire (911-612 BC) do we now see consistent use of professional armies that becomes prominent in the Near East from this period onwards but now begins to spreads to Europe and eventually influence the Roman Empire.<ref>For information about the Neo-Assyrian state and its development, see: Radner, Karen. 2015. ''Ancient Assyria: A Very Short Introduction''. First edition. Very Short Introductions 424. Oxford, United Kingdom: Oxford University Press.</ref> In the reign of Tiglath-pileser III (744-727 BC), new military reforms took place within the Neo-Assyrian state that saw a standing professional army develop, similar to what had been done in the third millennium BC, but now with more specialized soldiers along with auxiliary soldiers from various parts of the empire being incorporated into the military. These army units began to have distinct ranks and be part of specialized units within the military (Figure 2).<ref> For general information on the military reforms of Tigleth-Pileser III, see: Gabriel, Richard A. 2002. ''The Great Armies of Antiquity''. Westport, Conn: Praeger, pg. 127. For other information about Tigleth-Pileser III and his military reforms, see also: Anspacher, Abraham S. 2009. Tiglath Pileser III. Piscataway, NJ: Gorgias Press.</ref> This included the chariotry, cavalry, and infantry units; specialized units also included naval units consisting of Phoenicians. Other specialized soldiers include engineering units used for siege warfare. In addition, the army’s command structure became more sophisticated with developed ranks, similar to modern militaries. Several different large and independent armies were created within the state, as this helped to ensure that no single military unit would have unrestrained power and threaten the king’s authority. While kings still often led battles, generals now also began to have greater authority to lead armies without the presence of the king. The armies were now always able to fight in any time of the year, giving them a major advantage over enemies who were still constrained by labor shortages during the agriculture season, when men would have been needed to work the fields. Although this facilitated the Neo-Assyrian Empire’s ability to conduct warfare and expand in many areas, and sometimes simultaneously, generals could still potentially be threats to the throne. Furthermore, the Neo-Assyrians maintained the traditional conscription of its citizens as needed, which helped it attain reserve soldiers that were sometimes needed in times of crises or men shortages.  

The key development of the Neo-Assyrian Empire now became adopted by later armies, as new states began to realize the advantages of having a full-time army able to march as needed. The Achaemenid Empire (550-330 BC) in particular utilized many innovations by the Neo-Assyrians and even more greatly utilized different ethnic groups into its formations as the empire expanded.<ref> For a history of the Achaemenid Empire and its armies, see: Sekunda, Nick. 1992. ''The Persian Army: 560 - 330 BC''. Edited by Simon Chew. Elite Series 42.see: pg. 3.</ref>The Roman Empire in the Late Republic and Imperial phases began to also adopt a professional army composed of many units that were able to fight at any given time of year.<ref> For further details of how the late Republic and Imperial Roman armies functions as a professional fighting force, see: Southern, Pat. 2007. ''The Roman Army: A Social and Institutional History''. Oxford: Oxford Univ. Press.</ref> Initially, both ancient Greece and Rome armies consisted of soldiers that were conscripted for short periods, similar to ancient Mesopotamia; however, this was not sustainable for the Romans as they expanded their realm. The Roman army of the Imperial period heavily relied on volunteers and eventually created a much larger military bureaucracy and system where many legions or units simultaneously existed and composed of many nationalities. Many more units and specialized roles developed in the Roman army, where non-Romans found the army as one potential way to work up the Roman social ladder. For example, many emperors were of non-Roman origin and had advanced using the military.<ref> For information about some of the non-Roman emperors within the Roman Empire, see: Plutarch, Robin Seager, and Rex Warner. 2005. ''Fall of the Roman Republic''. Harmondsworth, Middlesex, England: Penguin Books.</ref> Nevertheless, the basic structure utilized by the Neo-Assyrians was largely maintained and was essentially continued by the Romans.