The Menzies government introduced censorship at the start of WWII and established the Department of Information, initially headed by Keith Murdoch, to manage it.
Censors controlled radio broadcasts, newspapers, telegraphs, telephones, and postal communications to ensure information was safe for public knowledge and to support the war effort.
Censors:
Banned servicemen and servicewomen from discussing the war or keeping diaries about it.
Checked and redacted letters to prevent sensitive information from reaching the enemy.
Ensured newspapers and radios provided positive war reports, emphasizing victories and downplaying losses.
Censor example:
After the Darwin air raids in 1941, newspapers reported 17 dead and 24 wounded, while the actual casualties were at least 243 dead and up to 400 wounded.