cowboys is a form of:

Artillery



noun
1.
(cannon or large rifled guns, the branch of an army using these guns, troops trained in the use of guns. -artillery-man artillerist) កងកាំភ្លើងធំ heavy artillery កាំភ្លើងធំ artillery join the កងកាំភ្លើងធំ
2.
(បច្ចេកទេស) កាំភ្លើងធំ, កងកាំភ្លើងធំ
ENGLISH MEANING
noun
1.
Munitions of war; implements for warfare, as slings, bows, and arrows.
2.
Cannon; great guns; ordnance, including guns, mortars, howitzers, etc., with their equipment of carriages, balls, bombs, and shot of all kinds.
3.
The men and officers of that branch of the army to which the care and management of artillery are confided.
4.
The science of artillery or gunnery.