It's a 155mm Howitzer M1918--Carriage M1918A3. It was based on the WWI French howitzer, the C 17 S 155mm. It was modified by the US using a different breech mechanism. In June 1940 there were 2,971 of these howitzers still in service.
Hey, who is that big guy?
Email - Jonathan.E.Stevens@wheaton.edu
copyright 2000 Wheaton, Illinois
Created 29 February 2000 - Updated 12 August 2001