US Divisions, in particular, come in one of four different flavors.
A little history of US Divisions in the 1920's is in order. I am part doing this to keep interest up, and part to keep bug reports down.
In 1922 (and indeed until the 1930's) The United States had plans to mobilizes up to 66 divisions. However, in actuality, there were 9 regular divisions, 3 overseas divisions, and 2 cavalry divisions. Of these, the overseas divisions, the 1st-3rd Division and 1st and 2nd Cavalry Divisions were all understrength, and the 4th-9th Divisions were only single Brigades.
The Philippine Division is commanded by US Officers, but is filled out with US Troops. The 31st United States Infantry is attached to it, but is modeled independently.
The Hawaiian Division (minus an infantry Rgt. until late 1922) is the largest US Force in the Pacific at the start of the game. If it is left at Hawaii, it will fill to its full TOE, including 37mm guns.
One of only 3 US Divisions in the 1920's. This unit is at its full TOE, with an allotment of M1917 light tanks in lieu of receiving 37mm guns. While historically understrength, for game purposes it is at full organized strength.
In the 1920's the 4th Division existed only on paper, its only unit being the 8th Infantry Brigade. TO get it in action quickly, a la the 2nd Division in WWI, the 8th Infantry is combined with the 1st Marine Brigade. The unit remains as such throughout the game.
The 78th US Division. This screen shows the standard TOE of the US Division. No division arrives with 37mm Guns. They must be kept in the rear areas to be equipped with them. That said, as Japan doesn't make use of many tanks, they are not a total necessity.
The 42nd Division. Some US Divisions, instead of their 155mm Howitzers, are equipped with 155mm Guns. Otherwise, they act as other divisions, receiving 37mm Guns IF they don't have M1917 Light Tanks.
In short: US Divisions, in order to equip with 37mm Guns, must stay in the rear areas for 2 to 3 weeks, depend upon how many divisions arrive.
US Divisions that are assigned light tanks DO NOT receive 37mm Guns.
Some US Divisions, in lieu of 155mm Howitzers, are equipped with 155mm Guns. Note that these Divisions are not as mobile as others.
And the 4th Division consists of an Infantry and a Marine Bde. You'll note in the scenarios their is a 1st Marine Bde, but it is 9999ed out, as it is assumed to be part of this division.
