the first photo is of a blueprint from 1918
but as you can see it has been updated to 1921 these
are how the bunkers are built like you read in history 1917 they are
14 feet thick reinforced
concrete outer shell with 3 feet thick reinforced concrete walls in
there day they could with stand
a direct hit from an enemy shell
this is a photo from the same file but this
blueprint is of the electrical system that was put in in 1921 the
new electrical system now allowed the men to have light to read by
and now they didn't have to manually operate the 12' inch guns
