Steel and World War 2

Alright, listen up, buttercup. This is gonna be rough for ya. The joke is that "steel" sounds like "steal." The joke implies that stealing led to World War II. Now, I know you're probably thinking, "But Explain bear, that doesn't make any sense!" And you're right, it doesn't. That's the joke. You wouldn't know humor if it slapped you in your chubby face.