World War 1 (1914 – 1918) The First World War remains the most costly conflict in terms of deaths and casualties. From a population of only five million, over 300,000 enlisted men were sent overseas, of which over 60,000 were killed and 156,000 wounded, gassed, or taken prisoner. Over 8,000 Australian soldiers died in the Gallipoli campaign, … Continue reading World War 1