American Military History, Volume 1

The military distinction nobles had formerly found in leading their own knights in battle they now sought as officers in the armies of their respective kings. Aristocrats filled the higher commands, while "gentlemen" of lesser rank and means usually served as captains and lieutenants. Advancement to higher ranks depended as much on wealth and influence at the court of a monarch as on demonstrated merit on the battlefield. Eighteenth century officers were hardly professionals in the modern sense of the word, usually having entered the service as mere boys through inheritance or purchase of a commission. Except for technical specialists in artillery and engineering, they were not required to attend a military school to train for their duties.

As the officers came from the highest classes, so the men in the ranks came from the lowest. They were normally recruited for long terms of service, sometimes by force, from among the peasants and the urban unemployed; more than a sprinkling of paupers, ne'er-do-wells, convicts, and drifters were in the ranks. Since recruiting extended across international boundaries, foreign mercenaries formed part of every European army. Discipline, not patriotic motivation, was the main reliance for making these men fight. Penalties for even minor offenses ran as high as a thousand lashes, and executions by hanging or firing squad were frequent. The habit of obedience inculcated on the drill ground carried over into battle, where, it has often been said, the men advanced because they preferred the uncertainties of combat to the certainty of death if they disobeyed orders. The army of Frederick the Great of Prussia was built into a military machine of near clock-like precision by brutal discipline and unquestioning obedience throughout the officer corps and rank and file soldiers.