Golden age of American animation

The golden age of American animation was a period that began with the popularization of sound synchronized cartoons in 1928 starting with Steamboat Willie, and gradually ended throughout the 1960s when theatrical animated cartoon film shorts lost ground to the newer medium of television. Animated media from after the golden age, especially on television, were produced on cheaper budgets and with more limited techniques starting in the late 1950s.

Source: Wikipedia — Golden age of American animation (CC BY-SA 4.0)