It shall be the duty of the governor, and the governor is hereby authorized and required, in case of war, invasion, insurrection, or breaches of the peace, or imminent danger thereof, or any forcible obstruction to the execution of the laws, or reasonable apprehension thereof, to call upon the national guard to defend the state or aid the civil authorities to enforce the laws thereof; and when the president of the United States shall make a call or requisition for troops, the governor shall first order into the service the organizations of the Kansas national guard and the officers thereof, of such organizations and arms of service as are specified in said requisition, and the governor is empowered and shall direct the respective officers thereof to recruit said organizations to conform in number to similar organizations in the army of the United States, or as may be required in said requisition.