14-18 1914-1918 archival archive armies army background belgian belgium captain-commandant complex cut cut-out cut-outs cutout europe european first flanders flood flooding ganzenpoot ganzepoot great heritage historic historical human humans i ijzer inundation locks military nieuport nieuwpoort nuyten officer old one out outs patrimony people person picture plain portrait portraits prudent river rivers sluice sluices soldier uniform war wars water waters west white world ww1 wwi yser