Rare WWI cannon stolen from Murray Bridge RSL club A World War I cannon similar to this has been stolen from the Murray Bridge RSL Club. Picture: Advertiser Library Source: adelaidenow A RARE cannon used in World War One has been stolen from the Murray Bridge RSL club just two days before Anzac Day. Police said the mortar cannon went missing from the club between Monday evening and Tuesday morning. RSL staff and locals are pleasding to have the cannon returned safely. Anyone with information which may assist police is asked to call Crime Stoppers on 1800 333 000, or online at www.sa.crimestoppers.com.au