Mo. Rev. Stat. § 41.100: Governor may reorganize, when.

Whenever in his judgment the efficiency of the militia will be increased thereby, or in the case of the National Guard, Air National Guard and naval militia to make same conform to any tables of organization or a system of training prescribed by laws of the United States or by regulations promulgated thereunder for the organization and training of the National Guard, Air National Guard or of the naval militia, the governor may organize, reorganize, change, consolidate or disband any organization, staff corps, department or detachment of the organized militia.