Ind. Code § 10-16-20-2

(1) "Military service" means: (A) in the case of a servicemember who is a member or reserve member of the United States Army, United States Navy, United States Air Force, United States Marine Corps, United States Space Force, or United States Coast Guard, full-time duty in the active military service, including: (i) full-time training duty; (ii) annual training duty; and (iii) attendance while at a school designated as a service school by federal law or by the secretary of the military department concerned; (B) in the case of a member or reserve member of the Indiana National Guard, service under a call to active: (i) service authorized by the President of the United States or the Secretary of Defense for a period of more than thirty (30) days in response to a national emergency declared by the President of the United States; or (ii) duty as defined by IC 10-16-7-23(a) for a period of more than thirty (30) consecutive days; (C) in the case of a servicemember who is a commissioned officer of the Public Health Service or the National Oceanic and Atmospheric Administration, active service; (D) in the case of a member or reserve member of the national guard of another state, service under an order by the governor of that state to active duty for a period of more than thirty (30) consecutive days; or (E) any period during which a servicemember is absent from duty on account of sickness, wounds, leave, or other lawful cause.