The profession of soldiering as part of a military group is older than recorded history itself. Some of the most enduring images of the classical antiquity portray the power and feats of its military leaders. The Battle of Kadesh in 1274 BC was one of the defining points of Pharaoh Ramesses II's reign and is celebrated in bas-relief on his monuments. A thousand years later the first emperor of unified China, Qin Shi Huang, was so determined to impress the gods with his military might that he was buried with an army of terracotta soldiers. The Romans were dedicated to military matters, leaving to posterity many treatises and writings as well as a large number of lavishly carved triumphal arches and columns.

In the modern era, world wars and countless other major conflicts have changed the employment of the militaries beyond recognition to their ancient participants. Empires have come and gone; states have grown and declined. Enormous social changes have been wrought, and military power continues to dominate international relations. The role of the military today is as central to global societies as it ever was.

Etymology and definitions

The first recorded use of military in English, spelled militarie, was in 1585.Oxford English Dictionary (2nd edition) Oxford: 1994 It comes from the Latin militaris (from Latin miles meaning "soldier") but is of uncertain etymology, one suggestion being derived from *mil-it- - going in a body or mass The word is now identified as denoting someone that is skilled in use of weapons, or engaged in military service or in warfare.Compact Oxford Dictionary onlineMerriam Webster Dictionary online

As a noun the military usually refers generally to a country's armed forces or sometimes, more specifically, to the senior officers who command them. In general it refers to the physicality of armed forces, their personnel, equipment, and physical space they occupy.

As an adjective military originally applied only to soldiers and soldiering, but it soon broadened to apply to land forces in general and anything to do with their profession. The names of both the Royal Military Academy (1741) and United States Military Academy (1802) reflect this. However, at about the time of Napoleonic wars "military" begun to be applied to armed forces as a whole and in the 21st century expressions like "military service", "military intelligence" and "military history" reflect this broader meaning. As such, it now connotes any activity performed by the military personnel.