In the Great war forum's western front section there is a post Kaiseschalacht-Twitter sections
@Kaiser'sBattle 13 Apr 18 the is a post of a film clip "Bilder Aus Der Grossen Schalacht" 18.31 minutes 6.38 minutes in there is a picture of a downed Bregeut 14. This film looks like most of it was taken during Operation Michael. Note at the begining there is a clip of cattle towing a German artillery piece. this happened the Kaiser heer was running out of horses in 1918 so oxen and cattle were used to tow artillery pieces. Lots of clips of war devastated land.