Hey Sabot, thanks for noticing my old NG arty unit!
Yeah, the MN Guard had the M110A2 8 inch up until 1996, they retired the last of the M110 series in the US Military. Replaced them with M198 towed 155mm (transition pieces yes, but come on...)
Those M109A5's have a very amusing past as well.
We picked those pieces up in the summer of 1996 from the 24th ID stocks that came back from Saudi Arabia via Texas. Those vehicles were in HORRIBLE shape. The maintenance guys told us it took 3 vehicles to make one good one, they were in such worn out shape. I got to be REAL familiar with them as I had just become a 64D, tracked vehicle recovery specialiat, and had to recover these nasty beasties in all kinds of crazy places and times. However, I not only got a good amount of experience recovering the the M109's and M548's we also got in terrible shape, but the crew I was training in also got a very nice training experience.