From 1932 he headed the Central Archive Administration of the USSR and was editor of the magazine " Red Archive " . In December 1937 , during the Great Terror the NKVD claimed to have uncovered a ' spy organisation ' working in the central archives . Berzin was arrested in December 1937 , and shot on charges of conspiring with " imperial forces " on 29 August 1938 . He was rehabilitated in 1956 , during the Khrushchev Thaw
Great Terror
Great Purge
Jānis Bērziņš-Ziemelis