1910s Turkish Fortifications at Salah El Din Castle, South Sinai.[7]
1960s & 1970s Egyptian Defensive fortifications built by Egyptian Armed forces during the Attrition war on the Western bank of Suez canal & Bar Lev Line of fortifications on Eastern side of Suez Canal (by Israel occupation forces).[7]
^Fry, Michael, and Hochstein, Miles. "The Forgotten Middle East Crisis of 1957: Gaza and Sharm el Sheikh." International History Review 15 (1993): 46 - 83 "The Forgotten Middle East Crisis of 1957: Gaza and Sharm el Sheikh."