Source material, as well as inspiration, for the Paksenarrion books might be of interest to some. The various legal systems are taken from the following: F. S. Lear's Treason in Roman and Germanic Law (specifically for the dwarf and gnome races), K. F. Drew's The Lombard Laws and The Burgundian Code, and other sources on medieval law, including a difficult-to-find translation of the Visigothic Code by A. Wilhelmsen. The development of the Code of Gird derives from the development of "barbarian" legal codes adapting Roman Law, shifts in English law during and after the Norman Conquest, and the development of "human rights-based" changes in law in and following the Enlightenment. Different city-states and nation-states were given different "balances" of the source material. Military history sources for both military science and military psychology included Herodotus, Xenophon, Thucydides, Caesar, and other classical sources, Conan Doyle's novel The White Company, Tuchman's A Distant Mirror, Sherman's Memoirs, and many others. Village life and crafts, in outline and detail, are taken from multiple sources on medieval/early Renaissance crafts and life, including the Surtees Society's collection of historical sources for that period. Further influences on the social and political aspects came from cultural anthropology sources. Historical sources suggesting the development of a paladin character ranged from Xenophon and Caesar (on the military side) and Plato, Aristotle, and Plutarch (for both military and general character consideration) to the "Chanson de Roland" and the Grail legends, with side journeys into other cultures (Scandinavian, Amerindian, Islamic). The history of Christianity and especially the incorporation of local heroes into "saint" roles (Joan of Arc in France, others in many other Catholic countries) provided historical background for development of Paksenarrion, Gird, and other hero-saints in that fictional universe.
The inspiration for "doing a paladin right" was the definition of paladin outlined in the D&D game; the specific character of Paksenarrion derived from historical figures (including Joan of Arc) and a mix of individuals known to the author. The specific character of Gird-farmer had roots in historical and fictional accounts of peasant/slave/worker uprisings; Gird-legend shared characteristics of several legendary (mythical and fictional) folk and religious heroes.
Questions explored in the books include the nature of the military mind, the character of the good soldier and the good commander, the essential characteristics of a hero and a paladin, the potential conflicts between what it takes to be a good soldier and what it takes to be a great hero, relationship between a paladin and his/her co-religionists (clergy, laity) and between a paladin and those not of the same belief, the source of a paladin's "commission" (e.g., who decides that someone is a paladin? how is that marked?), the essential characteristics of a hero-saint, the internal characteristics and outward influences that shape a hero-saint's actions and effects, the ways that subsequent generations redefine the meaning of earlier events and how that interpretation influences their actions.
—Elizabeth Moon, Wikipedia post[3]