* Diploma is fraudulent: The Army might determine the diploma is fake or obtained illegally.
* Insufficient academic record: Even if the diploma is real, the grades and coursework might not meet the Army's minimum educational requirements. This is especially true if the diploma doesn't demonstrate the completion of necessary courses.
* Incomplete documentation: The Army requires supporting documentation alongside the diploma. Missing transcripts, official school seals, or other required forms could lead to a rejection.
* Discrepancies in information: If information on the diploma or supporting documents doesn't match what the Army has on file, it will delay or reject the application.
In short, the problem wouldn't be the *school* itself, but rather the *verification* of the diploma's authenticity and the applicant's fulfillment of the Army's enlistment criteria.