I created an org chart like this for each of my nationalities. Some nationalities, like the Japanese, Chinese, Italians, and Allied Minors, consisted of one page, or one layer in the Raaco box. Other nationalities, like the Americans, Germans, British and Russians filled the whole box, both layers. Here is the link to the PDF of the entire org chart for all nationalities.
I use a Brother label maker to create labels for all of the inserts. I like white text on a black label. here is my American box as an example. With my Brother label maker, you can connect to a PC and create custom labels with any font and even use graphics. Note my American box with the Marine insignia.
Below is my entire ASL army in two Duratool Handy Box clones, with 8 storage boxes. I have one extra on top, which I may use for informational counters or the Finns when they come out!