image/svg+xmlOpenclipartWorld War I silhouette2006-12-20T06:44:36a silhouetted scene of two WWI soldiers with a biplane overhead from a public domain book cover.https://openclipart.org/detail/2170/world-war-i-silhouette-by-johnny_automaticjohnny_automaticbiplaneexternalsourcehistorypeoplesilhouettesoldierswarwwi