# Constantine’s field-army and frontier split becomes the later comitatenses/limitanei heading Date: 312 ## The fact Constantine’s government is the received consolidator of a mobile central field force beside frontier troops, the later comitatenses/limitanei distinction. It is one event. ## Context A field army can defend and can fight civil wars (already stored). This stores the administrative design as later copied. [Constantine the Great](/people/constantine-the-great)’s documented role is bounded by other offices and collaborators named in the sources below. Sharing a field with them is not a reason to drop a documented act, and it is not a reason to assign later consequences done in the name after death. Military historians reconstruct a mobile field army beside frontier troops. [Diocletian](/people/diocletian) began related reforms. Shared, his continuation after 312–324. Named person as heading of the dated public instrument. Later editors, museums, printers, or offices share publication. Complex where later carriers date the row. ## Evidence and sources Cambridge Ancient History and Britannica independently describe Constantinian military reorganization on Diocletianic foundations. Official or archival record: Cambridge Ancient History (https://www.cambridge.org/core/books/cambridge-ancient-history/; Cambridge University Press). ## Significance A copyable field/frontier split is an imperial industrial-policy path of medium confidence. A field army is not the solidus. A copyable field/frontier split is an imperial industrial-policy path of medium confidence. ## What is established and what is not Established: received military dual structure under Constantine. Not established: that it uniquely caused later fifth-century survival or collapse. What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions. The date is the date of this instrument, not a licence to back-date every later harm or benefit. Established here: a sourced, dated public instrument with a named contribution by Constantine the Great. What would change the picture: a contradictory original with a different date, signatory, or non-occurrence; a demonstrated forgery; or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of other causes. They are not a public rating. ## People - Constantine the Great: https://factrail.ai/people/constantine-the-great ## Drivers - Industrial-Policy Activism: https://factrail.ai/drivers/industrial-policy-activism ## Sources - https://www.britannica.com/biography/Constantine-I-Roman-emperor - https://www.cambridge.org/core/books/cambridge-ancient-history/ ## Methodology https://factrail.ai/methodology Canonical: https://factrail.ai/facts/co-military-reforms-comitatenses