11 50 U.S.C. § 526 applies to a loan made prior to the time the person entered the service (or prior to active duty in the case of reservists and National Guardsmen).  A serviceman who obtains a loan while already in the service is bound by the contract terms.  The Act applies to all persons on active duty in the Army, Navy, Air Force, Marines, Coast Guard, Public Health Service, as well as members of the Guard or the Reserves who have commenced active service.