See if this
older thread helps.
Also you need to look at the following:
§ 3911. Definitions.
[Section 101 of the Act]
For the purposes of this chapter:
(1) SERVICEMEMBER- The term `servicemember' means a member of the uniformed services, as that term is defined in section 101(a)(5) of title 10, United States Code.
(2) MILITARY SERVICE- The term `military service' means--
(A) in the case of a servicemember who is a member of the Army, Navy, Air Force, Marine Corps, or Coast Guard--
(i) active duty, as defined in section 101(d)(1) of title 10, United States Code, and
(ii)
in the case of a member of the National Guard, includes service under a call to active service authorized by the President or the Secretary of Defense for a period of
more than 30 consecutive days under section 502(f) of title 32, United States Code, for purposes of responding to a national emergency declared by the President and supported by Federal funds;
Section 502(f) . . . be ordered to perform training or other duty in addition to that prescribed under subsection (a). . . .
(2) The training or duty ordered to be performed under paragraph (1) may include the following:
(A) Support of operations or missions undertaken by the member's unit at the request of the President or Secretary of Defense.