When did Tandy buy RadioShack?

Can you tell me, when exactly did Tandy Corporation acquire RadioShack? I'm curious to know the year or even the specific date of this transaction, as it must have been a significant moment in the history of both companies. Did Tandy see RadioShack as a strategic fit for their portfolio, or was there a different motivation behind the acquisition? I'm eager to learn more about this pivotal event in the realm of retail electronics and finance.