Complex sentence: Maurice Levitas joined the Communist Party of Great Britain in 1933 and was also an active trade unionist, he and his brothers Max and Sol, were involved in the 1936 "Battle of Cable Street" against the British Union of Fascists.
Split into simpler sentences: Maurice Levitas joined the Communist Party of Great Britain in 1933 and was also an active trade unionist. He and his brothers Max and Sol, were involved in the 1936 "Battle of Cable Street" against the British Union of Fascists.