105mm

Reading the thread on "ship busters" for ww II and the mention of B-25s with 75mm howitzers, that reminded me of this: Has anyone else seen this before? http://www.dtic.mil/dtic/tr/fulltext/u2/750150.pdf It's basically a CH-47C with two externally mounted forward firing 105mm howitzers.

the light field howitzer was a common piece of artillery in WW2 what is your choice?, we can take in consideration also specifical national trouble (like minor countries or not motorized countries) in WW2: so only weapons that had fired in battle of WW2 light field howitzer: main thats around...