Lest we forget. Two minutes silence are observed on 11th November: at 'the 11th hour of the 11th day of the 11th month' (although in the UK the main ceremony of commemoration is Remembrance Sunday on the 2nd Sunday of November). The date and time mark the agreement that ended the First World War: the Armistice of Compiègne which went into effect at 11 am on 11th November 1918. The Armistice was signed in a carriage of the private train of Allied Commander French Generalissimo Ferdinand Foch [I doubt there are many in the UK and US who have even heard of him] who later - as the Treaty of Versailles was signed on 28 June 1919 - declared, when Germany was allowed to remain a united country, that "This is not a peace. It is an armistice for twenty years"...
They shall grow not old, as we that are left grow old:
Age shall not weary them, nor the years condemn.
At the going down of the sun and in the morning,
We will remember them.