Complex sentence: Leslie exited the print media in 1939 and became chairman of the Wyalkatchem District Patriotic Committee and the president of the local Returned Sailors'and Soldiers' Imperial League of Australia, joining the army in 1940, stationed in the Middle East.
Split into simpler sentences: Leslie exited the print media in 1939 and became chairman of the Wyalkatchem District Patriotic Committee and the president of the local Returned Sailors'and Soldiers' Imperial League of Australia. He joined the army in 1940, stationed in the Middle East.