Asked Siegfried Sassoon in his poem Aftermath.
And thankfully we haven't forgotten.
November 11th is still an important and emotional day.
Today is also the last of the Great War centenaries.
100 years ago today were the ceremonies of the burial of The Unknown Warrior in Westminster Abbey, and also the unveiling of the permanent stone Cenotaph in Whitehall.
Below is an original 1920s photograph of the Cenotaph.
You can just make out the people around it, laying flowers and wreaths to mark their lost ones from the war that had not long finished.
It had quickly become a national focal point for people's grief.