Since the OP's question has been answered I'll close this thread and for future reference,
from United's website regarding checked baggage allowances
Certain customers are exempt from paying checked baggage service charges for one or more bags within specified size and weight limits. Customers traveling with MileagePlus Premier members or dependents traveling with active U.S. military personnel will have the same exemption as the customer whose status provides for the benefit, as long as they are traveling in the same reservation.
goalie
UA Moderator