Technically, no. A recruit must first complete basic, then attend an “A” school, and sometimes a “C” school, depending on their determined occupation. Female Marines serve in ground units as Admin staff as well as supply clerks, which are both support shops for not just ground units, but even aviation and aviation support. So yes, females served in ground units decades ago.
You do know that you are talking to some retired SEAL combat operators here don’t you?
They know what they are talking about and your inability to provide proof/documentation of your specific claims marks you.
They are asking you these direct questions because they already know the answers after decades of service themselves...and are seeing if you will man up and admit that you were wrong on women recruits being deployed into ground combat infantry units for decades, or whether you will keep digging yourself in deeper.