"Up-to-date French defence installation examples"

Such record has been made about second line bunkers of Muola sector by one of the commissioned officer of 136 infantry of Soviet 13 Army which stormed this installations February, 1940. Allow me to observe, such caponiers (le Burge) were invented in France as far back as 1918 during WWI. In that case fire casemates were settled as ledges, but not in row as is on this picture.