In the New Mexico territory, look near Roswell to find a little flying saucer that has crashed and little green aliens with an SOS sign in the sand. When you go over that particular hex, at the bottom where it tells you what kind of land form you are on, instead of reading "Hill" it displays "(???)Hill".
Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding is recommended. With a text editor, edit the "maininifile.ini" file in the "poptop software\shattered union\data\other" directory. Note: You may first need to uncheck the "Read Only" file attribute. Change the value of the "INT SellPercentageOfPurchaseCost" line from "75" to "1000". Start a new campaign and immediately sell all your units for ten times their original value.