I wanted to do something on this, but couldn't find anything about this last day, only the war itself. So Dear Agatha is was!
In 1873, the last German troops leave France upon completion of payment of indemnity.
Born Mary Clarissa Agatha Miller in Torquay, Devon, England, Agatha Christie wrote 80 novels, 30 short story collections, 15 plays, and 6 romances under the pen name Mary Westmacott. Knighted in 1971, she died in 1976 with more than 400 million copies of her books sold in more than 100 languages.
It was during WWI, when her husband, Colonel Archibald Christie was fighting, that she learned about poisons while working in a pharmacy. Her first novel, featuring Hercule Poirot, The Mysterious Affair at Styles (1920), did OK, but it was her 2nd one, The Murder of Roger Ackroyd (1926) that was a bestseller and where she began her lifelong success.