Today we take a look at the origin and operation of the US super-heavy railway guns of WW1. Sources: The United States naval railway batteries in France - Edwin Denby Naval History books, use code 'DRACH' for 25% off - Free naval photos and channel posters - Want to support the channel? - Want to talk about ships? 'Legionnaire' by Scott Buckley - released under CC-BY 4.0.