Why German Intelligence Stopped Trying to Decode Messages Spoken in Plain English

By 1918, Germany had built the finest signals intelligence operation in the world. Their cryptanalysts were brilliant. Their technology was cutting edge. Their intercept teams could tap phone lines, capture radio transmissions, and crack enemy codes with astonishing speed and regularity. One of the main problems for the Allies in World War I was the Germans' ability to listen in on their communications and to break their codes, which were generally based on either European languages or mathematical progressions. Congressional Medal of Honor Society Allied commanders lived in fear of it. Battle plans changed. Positions shifted. Entire offensives were redesigned because German intelligence had already read the original orders before the ink dried. It was not just an advantage — it was a stranglehold on Allied strategy. And then, in the fall of 1918, something extraordinary happened. German analysts picked up a transmission they had never heard before. They leaned in. They ran it through every known cipher. They called in their best men. They understood nothing.