Definition
De militibus (Latin: "of" or "concerning knights") is the title of an English statute enacted in the first year of the reign of Edward II (1307–1308). The statute addressed the feudal obligation of distraint of knighthood — the requirement that any person holding a knight's fee (feudum militare) was compelled to formally assume the order of knighthood (suscipere arma militaria, literally "to take up military arms"). The statute's purpose was to curtail or regulate this coercive aspect of the feudal tenure system, which had become a mechanism for royal revenue extraction more than a genuine military institution.
The term functions almost exclusively as a statutory title and historical shorthand for the law, not as a free-standing legal concept with independent doctrinal application.
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Why It Matters in Research
Researchers encountering de militibus in historical sources should understand it primarily as a citation marker, not a substantive doctrine. It appears in English legal history in discussions of feudal tenure reform, the decline of the knight's fee system, and parliamentary legislation during the reign of Edward II.
Burrill notes that the enactment was said to have been "not properly a legislative" act in the strict sense — the entry in Burrill's dictionary is truncated, but this observation likely reflects the scholarly debate over whether the measure originated as royal ordinance rather than parliamentary statute. Researchers relying on historical sources should be alert to this ambiguity: what is called a "statute" in older sources may not have had the formal legislative character that term implies to modern readers.
The practical significance of distraint of knighthood as a revenue device recurred under later monarchs, most notably Charles I, who revived the compulsory knighthood fines in the 1620s–1630s as a non-parliamentary revenue measure — a practice that became one of the grievances leading to the English Civil War. De militibus itself predates that controversy, but researchers tracing the lineage of knighthood distraint will frequently encounter the statute as a foundational reference point.
The term is unlikely to appear in American legal sources except in the most historically oriented treatises on feudal tenure, and has no operative modern legal significance in any common law jurisdiction.
Key sources for contextualizing this term in the Law Mind corpus: Crabb's History of English Law, Reeves' History of English Law, and Coke's Institutes (2 Inst. 593), all cited by Burrill, remain the standard historical authorities on this statute's scope and character.
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Historical Dictionary Support
Burrill's Law Dictionary is the sole shelf source covering this term. Burrill frames de militibus cleanly as a statutory title addressing the feudal obligation to accept knighthood, citing Crabb's History (p. 201–202), Reeves' History of English Law (vol. 2, p. 288), and Coke's Second Institutes (p. 593). The entry is unfortunately truncated in the available text, cutting off at the observation that the act was "not properly a legisl[ative act]" — which Crabb and Reeves expand upon in their respective histories.
Historical dictionaries of English law consistently treat de militibus as a reference term rather than a term of art with doctrinal content. The underlying practice it addressed — compulsory assumption of the knighthood incident to tenure — was a well-documented feature of feudal land law that Blackstone and other institutional writers discuss in the context of the burdens and incidents of military tenure, though they do not always name the statute explicitly.
No material divergence exists among historical sources on the basic description of the statute. The open question — whether it was ordinance or statute — is one of historical classification rather than legal substance.
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Jurisdictional Note
De militibus has no operative force in any modern jurisdiction. It is a matter of English legal history only. Researchers working in American property law history may encounter it in discussions tracing the feudal roots of land tenure, but it carries no jurisdictional significance beyond England's medieval and early modern period.
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