Complex sentence: Previous to the changes to monetary allowance marriage between juicy girls and service members was rare, currently the medical, dental, commisary and PX are being overrun by juicy girls and their newborn children.
Split into simpler sentences: Previous to the changes, marriage between juicy girls and service members was rare. Currently the medical, dental, commisary and PX (Post Exchange) are being overrun by juicy girls and their newborn children.