The 1st Infantry could take a while. I thinking of using a color scheme like the 1st Cavalry. That way the emblem will show up.
The inventory looks like this:
81x INF
46x HMG
18x ENG
3x I&R
10x 81mm Mortar
18x 37mm AT
6x M3/75
3x M3/105
3x M3A1 Scout Car
9x 105mm M2 Howitzers
3x 155mm Howitzers
66x Trucks
14x Jeeps
9x 18 Off-board Artillery
3x 24 Off-board Artillery
It covers almost all of 4 sheets.