In early 1917, a single intercepted message changed the course of history. The Zimmermann Telegram, a secret German proposal to Mexico, promised lost U.S. territories in exchange for an alliance—an audacious gamble that backfired spectacularly.

When Britain exposed it, American outrage erupted, pushing the U.S. into World War I.

In this episode, we unravel the intrigue, deception, and unintended consequences of Germany’s diplomatic blunder that sealed its fate and reshaped the world.