World War II Poster Encouraging American Workers - NA002261 - Rights Managed - Stock Photo - Corbis. A World War II color poster encouraging American workers to work hard. The poster shows caricatures of enemy leaders peeking from behind a pole, with a caption that reads: "They're watching us. . .PLENTY! The stuff "on order" doesn't count. . .but real production hurts them! Put ALL your power in the job!" ca. 1942.