A powerful tribute to the brave but ultimately unsuccessful defence of Greece by Allied forces early in WWII, the 2015 50c Greece Cu-Ni Unc from the Royal Australian Mint is also a compulsory acquisition for serious decimal collectors.
Initially attempting to remain neutral, Greece entered the war after Italy invaded in late 1940. Mussolini's forces suffered several setbacks in what became known as the Greco-Italian War, however, and Germany was forced to step in. This was largely because Greece was strategically crucial to the Germans. If Greece became a British ally, the Germans would have been denied access to the Romanian oilfields, and to ensure that this did not happen, the Nazis invaded on 6 April 1941. In little more than three weeks, the Axis forces had swept aside all resistance, achieving a decisive victory and capturing thousands of Allied servicemen.