When Dr. Adrian Mallory and General Mark R. Naird are arguing about whether or not the Post Office still exists, Dr. Mallory asks where Gen. Naird thinks the Space Force got their funding from. The United States Postal Service does not receive any federal funding, relying only on its own sales for revenue.
Dr. Adrian Mallory tells General Mark R. Naird that he can get help from one of the WalMart "fashion consultants", and informs him that they're the ones in the red vests. WalMart employees wear blue or yellow vests.
At the ice cream stand the sign states "Back in five light years [sic]". A light-year is a distance, not a measure of time.