Is "baggage" as "portable military equipment" a technical or an old-fashioned term?

It appears to be a technical term but not an old-fashioned one:

In military terminology, baggage is any equipment that can be carried or hauled along. This is the original definition, from the Old French baggage, "military equipment," from bague, for "bag or bundle."(Vocabulary.com)

Dictionary.com lists as second, out of three, the sense of military equipment, but they don’t define it as archaic like other definitions such as prostitute.