In the purer ages of the commonwealth, the use of arms was reserved for those ranks of citizens who had a country to love, a property to defend, and some share in enacting those laws which it was their interest, as well as duty, to maintain. But in proportion as the public freedom was lost in extent of conquest, war was gradually improved into an art, and degraded into a trade.

The History of the Decline and Fall of the Roman Empire. By Edward Gibbon.. A New Edition (ed. 1797)