Tenn. Code Ann. § 58-1-226: Exemption from civil process and arrest

Except for the commission of treason, a felony or a breach of the peace, the officers and enlisted personnel of the national guard shall be exempt from service of civil process and from arrest while actually engaged in the following activities:

(1) Drill;

(2) Instruction;

(3) Voluntary aid and assistance; or

(4) Other military duty.