Ordnance
Part of speech: noun
Definition: military equipment, especially weapons and ammunition. artillery.
Artillery
Part of speech: noun
Definition: Large cannon like weapons, transportable and usually operated by more than one personA unit of the army, that uses such weaponsgunnery
Example sentence: The idea of aerial military surveillance dates back to the Civil War, when both the Union and the Confederacy used hot-air balloons to spy on the other side, tracking troop movements and helping to direct artillery fire.