Significance of Soldiers' poppy & rosemary tradition

The poppy's significance to Remembrance Day stems from the poem "In Flanders Fields". In it, the red poppies that flowered across some of the worst battlefields of Flanders in WW1 were symbolic of the bloodshed of trench warfare.

Since 1921 wearing a poppy has enabled Australians to show they haven't forgotten the countrymen who gave their lives in wars & conflicts during the past 100 years.

With regard to the wearing of Rosemary - ancient Greeks believed it made their memories stronger. This idea has been carried on today when people wear sprigs of Rosemary as a symbol of remembrance for those who have died in wars.