As the Newsweek article says, not only if Tiffany Trump joined the military she'd be disinherited but also if she joined the Peace Corps!... The 1993 prenup, obtained and reported by Vanity Fair on Tuesday, established that Donald Trump would halt $100,000 child support payments for Tiffany Trump when she turned 21 years old, or earlier if she joined the military, the Peace Corps., or landed a full-time job. https://www.newsweek.com/tiffany-trump-child-support-payments-would-have-been-stopped-donald-if-she-joined-military-prenup-1442203