The breakthrough enabled the Allies to anticipate German military maneuvers, although sometimes the Allies would allow an attack to occur successfully in order to avoid signaling to the Germans that their code had been broken. The Allied code-breaking effort was known as "Ultra", as in "ultra-secret". | The breakthrough enabled the Allies to anticipate German military maneuvers, although sometimes the Allies would allow an attack to occur successfully in order to avoid signaling to the Germans that their code had been broken. The Allied code-breaking effort was known as "Ultra", as in "ultra-secret". |