Complex sentence: One of rebellion leaders was a former official of the Socialist-Revolutionary Party, Alexander Antonov, and therefore in Soviet history it was wrongfully named as the Antonov's mutiny or Antonovschina, and portrayed simply as some sort of anarchial banditism.
Split into simpler sentences: One of rebellion leaders was a former official of the Socialist-Revolutionary Party, Alexander Antonov, and therefore in Soviet history it was named the Antonovschina. The rebellion in Soviet history was portrayed simply as some sort of anarchial banditism.