The Nutty Network(1939)

A jungle land radio station run by monkeys pulls a prank by reporting an invasion from space is occurring and a large cutout face is hoisted above the trees so all can see. Fireworks are employed to sound like a war has started. The King, a Lion with a Bert Lahr voice, finally exposes the fakers. Inspired by Orson Welles' "War Of the Worlds" radio hoax.