The Roll of Honour at the Australian War Memorial, Canberra. It's a series of walls that lists the names of all those who died while on active service in the Australian military. One of my family members killed in France in 1917.
888246 china poppies in the moat of the Tower of London, 1 for every British and Commonwealth soldier who died. http://www.britishlegion.org.uk/remembrance/ww1-centenary/poppies-in-the-moat