According to the USC, Title 10, Subtitle A, Part 1, Chapter 13, Section 311
Section 311. Militia: composition and classes
(a) The militia of the United States consists of all able-bodied
males at least 17 years of age and, except as provided in section
313 of title 32, under 45 years of age who are, or who have made a
declaration of intention to become, citizens of the United States
and of female citizens of the United States who are members of the
National Guard.
(b) The classes of the militia are -
(1) the organized militia, which consists of the National Guard
and the Naval Militia; and
(2) the unorganized militia, which consists of the members of
the militia who are not members of the National Guard or the
Naval Militia.
U.S. Code as of: 01/19/04
Regards,
Kevin
http://www.constitution.org/mil/mil_act_1792.htmIII. And be it further enacted, That within one year after the passing of the Act, the militia of the respective states shall be arranged into divisions, brigades, regiments, battalions, and companies, as the legislature of each state shall direct; and each division, brigade, and regiment, shall be numbered at the formation thereof; and a record made of such numbers of the Adjutant-General's office in the state; and when in the field, or in serviced in the state, such division, brigade, and regiment shall, respectively, take rank according to their numbers, reckoning the first and lowest number highest in rank. That if the same be convenient, each brigade shall consist of four regiments; each regiment or two battalions; each battalion of five companies; each company of sixty-four privates. That the said militia shall be officered by the respective states, as follows: To each division on Major-General, with two Aids-de-camp, with the rank of major; to each brigade, one brigadier-major, with the rank of a major; to each company, one captain, one lieutenant, one ensign, four serjeants, four corporals, one drummer, and one fifer and bugler. That there shall be a regimental staff, to consist of one adjutant, and one quartermaster, to rank as lieutenants; one paymaster; one surgeon, and one surgeon's mate; one serjeant-major; one drum- major, and one fife-major.
IV. And be it further enacted, That out of the militia enrolled as is herein directed, there shall be formed for each battalion, as least one company of grenadiers, light infantry or riflemen; and that each division there shall be, at least, one company of artillery, and one troop of horse: There shall be to each company of artillery, one captain, two lieutenants, four serjeants, four corporals, six gunners, six bombardiers, one drummer, and one fifer. The officers to be armed with a sword or hanger, a fusee, bayonet and belt, with a cartridge box to contain twelve cartridges; and each private of matoss shall furnish themselves with good horses of at least fourteen hands and an half high, and to be armed with a sword and pair of pistols, the holsters of which to be covered with bearskin caps. Each dragoon to furnish himself with a serviceable horse, at least fourteen hands and an half high, a good saddle, bridle, mail-pillion and valise, holster, and a best plate and crupper, a pair of boots and spurs; a pair of pistols, a sabre, and a cartouchbox to contain twelve cartridges for pistols. That each company of artillery and troop of house shall be formed of volunteers from the brigade, at the discretion of the Commander in Chief of the State, not exceeding one company of each to a regiment, nor more in number than one eleventh part of the infantry, and shall be uniformly clothed in raiments, to be furnished at their expense, the colour and fashion to be determined by the Brigadier commanding the brigade to which they belong.
V. And be it further enacted, That each battalion and regiment shall be provided with the state and regimental colours by the Field-Officers, and each company with a drum and fife or bugle-horn, by the commissioned officers of the company, in such manner as the legislature of the respective States shall direct.
VI. And be it further enacted, That there shall be an adjutant general appointed in each state, whose duty it shall be to distribute all orders for the Commander in Chief of the State to the several corps; to attend all publick reviews, when the Commander in Chief of the State shall review the militia, or any part thereof; to obey all orders from him relative to carrying into execution, and perfecting, the system of military discipline established by this Act; to furnish blank forms of different returns that may be required; and to explain the principles of which they should be made; to receive from the several officers of the different corps throughout the state, returns of the militia under their command, reporting the actual situation of their arms, accoutrements, and ammunition, their delinquencies, and every other thing which relates to the general advancement of good order and discipline: All which, the several officers of the division, brigades, regiments, and battalions are hereby required to make in the usual manner, so that the said adjutant general may be duly furnished therewith: From all which returns be shall make proper abstracts, and by the same annually before the Commander in Chief of the State.
The States revise the military codes - 1881 to 1892
Concern over the militia's new domestic role also led the States to reexamine their need for a well-equipped and trained militia, and between 1881 and 1892, every state revised the military code to provide for an organized force. Most changed the name of their militias to the National Guard, following New York's example.
The Militia Act, 1903
affirmed the National Guard as the primary organized reserve force.
Between 1903 and the 1920's, legislation was enacted that strengthened the Army National Guard as a component of the national defense force. The Dick Act of 1903 replaced the 1792 Militia Act and affirmed the National Guard as the Army's primary organized reserve.
The National Defense Act, 1916
guaranteed the State militias as the primary reserve force; gave the President the authority to mobilize the Guard during war or national emergency; made use of the term "National Guard" mandatory; authorized drill pay for the first time.
The National Defense Act of 1916 further expanded the Guard's role and guaranteed the State militias' status as the Army's primary reserve force. Furthermore, the law mandated use of the term "National Guard" for that force. Moreover, the President was given authority, in case of war or national emergency, to mobilize the National Guard for the duration of the emergency. The number of yearly drills increased from 24 to 48 and annual training from five to 15 days. Drill pay was authorized for the first time.
The National Defense Act Amendments, 1920
put the National Guard on the general staff; reorganized the divisions.
The National Guard Mobilization Act, 1933
made the National Guard a component of the Army.
The Total Force Policy, 1973
Requires all active and reserve military organizations be treated as a single integrated force; reinforced the original intent of the founding fathers (a small standing army complemented by citizen-soldiers.)
Regards,