Following the signing of the Treaty of Versailles in 1919, Germany was not permitted to build or operate submarines. However clandestine training onboard Finnish and Spanish submarines took place and U-boats were still built to German designs in Dutch yards.
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Following the signing of the Treaty of Versailles in 1919, Germany was not permitted to build or operate submarines. However clandestine training onboard Finnish and Spanish submarines took place and U-boats were still built to German designs in Dutch yards.
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