cannon or artillery.

military weapons with their equipment, ammunition, etc.

the branch of an army that procures, stores, and issues, weapons, munitions, and combat vehicles and maintains arsenals for their development and testing.

noun

arms , big guns , bombs , heavy stuff , missiles , munitions , weaponsnotes:ordinance means an authoritative rule or a statute enacted by a city government , while ordnance means military supplies or heavy artillery , ammunition , armaments , armor , artillery , cannon , equipment , guns , supplies , torpedoes , weapons