Solomon Islands 2015 $10 First World War Centenary Gallipoli Landing Silver Coloured Proof CoinWith the Allies seeking to obtain a strategic advantage in the First World War, an attack was launched in the Dardanelles. It was hoped that the Turkish defenders would be crushed and that the Allied fleet could then steam into Constantinople, forcing the Ottoman Empire to surrender. In the first major military engagement for Australia during the First World War, the ANZACs landed on the tiny beaches of Gallipoli at dawn on the 25th of April, 1915.