Here's why:
* Early Disney: Walt Disney and Ub Iwerks created Oswald in 1927. He was a huge success, rivaling Mickey Mouse in popularity at the time.
* Loss of Oswald: Disney lost the rights to Oswald in 1928 due to a contract dispute with his distributor, Universal.
* Mickey Mouse's Debut: Shortly after losing Oswald, Disney and Iwerks created Mickey Mouse in 1928. Mickey quickly became a global sensation and overshadowed Oswald.
So, while Oswald came first, Mickey Mouse became the most iconic and the face of Disney.