Dave Miller founded his own clothing retail store named Miller's Outpost in 1972. The business debuted in Ontario and Pomona specializing in clothing catered to young adults. Soon thereafter the business took off, spawning 210 stores in the region by the turn of the decade. Miller sold his company shortly after reaching the centennial milestone to Amcena Corporation. The new owner continued the store's growth trend, expanding to over 300 storefronts across California, Arizona, Nevada, New Mexico, Texas and other states by the end of the 1980s.