Mounted guns and other military weapons are an example of ordnance.
Origin of ordnance
- Middle English ordnaunce variant of ordinaunce order, military provision ordinance
From American Heritage Dictionary of the English Language, 5th Edition
- A reduced form of ordinance, which is attested from the late 14th century in the sense of "military equipment or provisions". The sense of "artillery" arises in the early 15th century, the sense "military logistics" in the late 15th century. The shortened form ordnance arises by the 17th century, now distinct in meaning from the surviving meanings of ordinance.