2015 20c Australia Remembers: Coo-Ee March Twenty Cent Uncirculated Coin. The morning of 10th October 1916, saw 26 men start marching from their hometown of Gilandra towards Sydney to join the Australian Imperial Force. The Coo-ees as they became had become known had increased to 263 by the time they had travelled the 320 miles to Sydney to enlist. Please contact Adelaide Exchange Jewellers to find out more on this item.