So you can't wait the six months it takes to get M1's over to Lower Slabovia along with all the support they require.
You're a grunt, and you've got to take out a machinegun nest. Wouldn't it be nice to call in some wheeled LAV with a 20mm to pound the MG for a while? How about a LAV with a 4.2 mortar, with onboard fire control?
In the future, you can't wait, and if you do, you might lose the war.