The Lost Battalion of Celtic Wood (opens in new tab)

On 9 October 1917, during the Third Battle of Ypres, a battalion of Australian soldiers entered a place known as Celtic Wood, near Passchendaele in West Flanders, Belgium, to attack German positions. Most were never seen again. Of the 85 men to raid Celtic Wood, just 14 made it back to their lines. The rest vanished without a trace. The fate of the lost battalion has remained one of the greatest enigmas of Australia's Great War.