Slitherine

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 scenario (Achnacarry) where the M3 75 GMC unit was now an anti-tank unit. Is this as intended, and if so, why? Thanks for any explanation of this unit conversion.

you can switch between anti tank and artillery , if you click on the unit you will see the switch toggle, it looks like a cross sight, if you click on it, the barrel on the unit will raise or drop to show which mode it is in.

I noticed that even if you have it switched as artillary it automatically switches back to AT inbetween scenarios, not helpful.

It's default setting is always AT, so I found it helpful to place on front lines with an arty backing it which created a nice little wall in case the enemy gets to attack the first turn, and then easy to move and fire as arty in that 1st crucial round

It is the same unit, its one of the units that can switch between indirect fire (artillery) and direct fire (anti-tank).

By default it's AT so every start of scenario it's starts as an AT like german 88 starts at AA even I use him as AT most of the time. You can buy more GMC from AT area in future and by far that's my favorite unit, give you a chance to level up the AT fast and upgrade it in future to other ATs which you will need when you meet mr tiger. Green AT don't perform well against mr tiger

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.

Hotkey for switching modes is w.

Glad I found this thread. Maybe I missed them, but are there other units that switch between AT and artillery? The German 88mm and other AA/AT pieces switch between AA and AT, but I don't recall any switching between AT and artillery before this. Thanks.

Germans have StuH that is AT/arty
Soviet have SU-122 that is AT/arty
AA guns also have some switchable

There are othe strange switchable
Italian Sahara is recon / infantry

Along these lines, switching the artillery units to AT mode is a great way for them to rack up kills.