Stalin secret police what four letter acronym were they called in his time

The secret police became the primary pillar of Stalin's personal dictatorship, that is Stalin’s secret police. OGPU was the secret police which sometimes was a part of NKVD (which means Narodny Komissariat Vnutrennih Del, that is People's Comissariat of Internal Affairs), and sometimes was not. The OGPU was reorganized under the acronym NKVD in 1934. 

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explanation:

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.