Thank you all for your quick and helpful replies. I am always amazed at how much there still is to learn after playing the game for a few years now.

Hello. I just started the US Corps grand campaign. One of the eight units I chose for the first scenario (Formation) was an M3 75 GMC. This unit was depicted as Artillary in the Formation scenario. After completing the Formation scenario using the M3 75 GMC unit as artillary, I moved to the next sce...