Under CA laws...
CA Military & Veterns Code 120
The militia of the State shall consist of the National Guard, State Military Reserve and the Naval Militia--which constitute the active militia --and the unorganized militia.
CA Military & Veterns Code 121
The unorganized militia consists of all persons liable to service in the militia, but not members of the National Guard or the Naval Militia.
CA Military & Veterns Code 122
The militia of the State consists of all able-bodied male citizens and all other able-bodied males who have declared their intention to become citizens of the United States, who are between the ages of eighteen and forty-five, and who are residents of the State, and of such other persons as may upon their own application be enlisted or commissioned therein pursuant to the provisions of this division, subject, however, to such exemptions as now exist or may be hereafter created by the laws of the United States or of this State.
CA Military & Veterns Code 128
The unorganized militia may be called for active duty in case of war, rebellion, insurrection, invasion, tumult, riot, breach of the peace, public calamity or catastrophe, or other emergency, or imminent danger thereof, or may be called forth for service under the Constitution and laws of the United States. Whenever it is necessary to call out any portion of the unorganized militia, the Governor may call for and accept as many volunteers as are required for such service, under regulations provided by this division.
CA Military & Veterns Code 410
The National Guard, Naval Militia, and unorganized militia when called into active service shall be provided by the State with the supplies and equipment, not supplied by the United States, necessary for the proper performance of functions authorized or prescribed by the laws and regulations of the State and the United States.
CA Penal Code 11460
(a) Any two or more persons who assemble as a paramilitary organization for the purpose of practicing with weapons shall be punished by imprisonment in a county jail for not more than one year or by a fine of not more than one thousand dollars ($1,000), or by both that fine and imprisonment.
As used in this subdivision, "paramilitary organization" means an organization which is not an agency of the United States government or of the State of California, or which is not a private school meeting the requirements set forth in Section 48222 of the Education Code, but which engages in instruction or training in guerrilla warfare or sabotage, or which, as an organization, engages in rioting or the violent disruption of, or the violent interference with, school activities.