field artillery

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Artillery other than antiaircraft artillery that is light enough to be mounted for use in the field.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The part of an army's artillery which consists of (light) fieldpieces (canons, howitzers) which are mobile enough to deploy on the (battle) field, as opposed to the fixed guns in fortifications or naval artillery; usually excludes antiaircraft.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun movable artillery (other than antiaircraft) used by armies in the field (especially for direct support of front-line troops)