Hoi, as there also WERE "written rules" such as "Max's Axis & Allies" and "2nd" Edition", or XENO 'Rules and Set-up Charts', of which begat their multiple 'Games' that included their versions of 'bits' for this. They even included additions with 'Submarine Pens', colours of 'A-A'- 'Factories', etc. since their 'minis' were slightly smaller, overall. We used the 'light gray ones' as "Italy"-types, until there were 'lighter GREEN ' had been made available in other 'Games'. I can't recall precisely WHEN it was that I decided about making "Fortifications" -'bits' for uses in the "A&A"-series, while HOW they became derived from "M~opoly" Houses and Hotels has to been "dueing" with their abundance in copious quantities of 'Games' inclusion. I forget the NAME "name" of one with multi-colours 'Hotels', yet they'd require some 'Neutralized'-colour such as with "A-A"/"I.P.C" sort.