Operator 5 #15: Invasion of the Yellow Warlords

By land and by sea the ferocious Yellow Hordes descend upon the United States, dealing destruction with new and horrifying weapons: with viscid poisons, with lethal gases, with flaming thermite—and with an invisible death-force more fearful, more annihilating than any weapon yet known to man. Before the ruthless Asiatic Invaders even Operator 5, America’s Secret Service Ace, stands helpless—hunted like a rat, harried and set upon by those who should be striving shoulder to shoulder with him to turn back the greatest Yellow Threat ever to assail the bulwarks of Western Civilization!

By Frederick C. Davis, writing as Curtis Steele