Leon Trotsky was a Russian revolutionary and Marxist theorist who played a key role in the 1917 October Revolution that overthrew the Tsarist regime. His initials, LEON, are a four-letter solution to the crossword puzzle. XJCH is also a four-letter solution to the crossword puzzle and is an acronym for the Russian name of the Communist Party, which Trotsky joined in 1898. Together, the two solutions, LEON and XJCH, refer to the Revolutionary Trotsky.