Harry Truman actually said...
SECTION 6 (a). Any person who, in order to perform active service with the military or naval forces of the United States, has left a position (other than a temporary position) which is covered into the classified civil service under section 1 of this order, shall be reinstated in such position or to a position of like seniority, status, and pay in the same department or agency, and may, upon reinstatement, acquire a classified civil-service status.
Context
Executive Order 9712—Amendment of Executive Order No. 8743 of April 23, 1941, Extending the Classified Civil Service
04/12/1946