The expansion was supposedly renamed "Really Big Expansion" on April 1, 1999, due to "a legal snafu" with the U.S. Patent and Trademark Office. It was part of an April Fool's Day joke by the developer, though - the main game was renamed "Really Cool Wargame".
Under the "Special Thanks" section of the readme, one of the names listed is Krogoth, the ultra-powerful new game-ender Kbot.
The original EU release was so bugged that half the features didn't work. GT Interactive recalled most of this batch but a patch for those that did slip was never released.