Part 5/9:
The journey to crack the Enigma did not begin in Britain. Before the outbreak of war, Polish cryptanalysts, including Marian Rejewski, made considerable strides in understanding the Enigma's workings. They had successfully decoded messages using stolen blueprints of the machine. However, with the introduction of upgraded machines and configurations, their methods became ineffective.
Recognizing the escalating danger, the Polish team collaborated with British intelligence, providing crucial insights that laid the groundwork for Turing's efforts at Bletchley Park.