Why were poppies worn in World War 2?

Answer 1

Soldiers didn't wear poppies in WW2. The tradition of wearing a red poppy button originates from the 1917 poem "In Flander's Fields", by John MacRae. He wrote a poem about the carnage he saw during the Great War, and in the first line, says:

"In Flander's Fields, the poppies blow, between the crosses, row on row."

In honor of MacRae and his poem, the poppy has become a symbol for Remembrance Day in Canada - a day where all soldiers fallen in battle are remembered and mourned.