Lafayette Escadrille, an air squadron for American volunteers is formed in France.#ww1 #fww #onthisday — WorldWar1 Day by Day (@WW1TheGreatWar) April 20, 2016 from Twitter https://twitter.com/WW1TheGreatWar April 20, 2016 at 10:40AM To follow day by day events from 100 years ago, you can follow the live streams on Twitter or Facebook. https://twitter.com/WW1TheGreatWar http://ift.tt/1mDRWDO