There were numerous supply bunkers , storage areas , barracks , hospitals , and command and control facilities. , all concealed from aerial observation by an intricate system of natural and man - made camouflage that was constantly expanded and replaced .
There were numerous supply bunkers , storage areas , barracks , hospitals , and command and control facilities . 
 All of this was concealed from aerial observation by an intricate system of natural and man - made camouflage that was constantly expanded and replaced .