Vietnam-Dien Bien Phu, The remaining positions east of the Muong Thanh River, E3, E10; and D3, D5 and D6 have disappeared under developments and. residential area. I could find no markers for these. But, as you walk towards the Muong Thanh Bridge on your left you will see Dien Bien Phu’s other, more colourful, market and on your right, in a small bog, you will see a large monument type marker. This marks the site of Piroth’s bunker at E12. On the foreground B/w file picture shows French Military camp and Muong Thanh Bridge on the background and on the background residential area. . ... .. . . .