What is the meaning of the poppy in flanders field of world war 1?

picture it. world war one, there is complete devastation. buildings, roads, tree's, and natural life, disintegrated into seas of mud-- graves for soldiers while still more fought on. Only one think boomed. the blood red poppy. marking the graves of loved and lost soldiers.

then so this guy John McCrae, a poet, and a surgeon in the war went to his friends grave and saw red flowers growing fearlessly upon the graves of the soldiers so he makes a poem about it. The poem [ In Flanders Fields] would go on to be the voice of every man and mother who died of lost someone in the First World War.