Ad Halom (lit. "up to here") refers to the northernmost point reached by the Egyptian army in Operation Pleshet, one of the battles of the 1948 Arab–Israeli War. Since then, the term is used in Hebrew to emphasize the last line of defense that must not be defeated. The term was also used in the name of the company "Adallom".
On May 29, 1948, Israel had dispatched four Avia S-199 aircraft, flown by Lou Lenart, Ezer Weizman, Modi Alon and Eddie Cohen, to attack the Egyptians between the Arab village of Isdud and the bridge over the Lachish River. Cohen, a Machal pilot from South Africa, was shot down by anti-aircraft fire, becoming the first casualty of the fledgling IAF. The Givati Brigade blew up the bridge and defended the river bank from a pillbox during Operation Barak. The Egyptian Army later took up positions at the site, which saw two battles in mid-1948.
The Egyptian forces were later defeated in Operation Yoav; the pillbox and defensive wall remain as memorials of the events.
As part of Camp David Accords between Israel and Egypt a monument in the memory of the fallen Egyptian soldiers was established. It was compensation for the abandonment of Israeli obelisks in the Sinai peninsula. The inscriptions on the four edges are in Hebrew, Arabic, English and hieroglyphs.
The Ad Halom Bridge was built over the Lakhish River (Wadi Sukrir/Wadi Fakhira) during the Roman period, and re-built by the Ottoman Empire at the end of the 19th century. A parallel railway bridge was added when the coastal railway (Lebanon–Egypt) was laid. After numerous armed raids in the area during the 1936–1939 Arab revolt in Palestine, the British authorities set up a series of pillboxes in the area, one of them next to the bridges. After its destruction in the Independence War, the bridge was reconstructed and upgraded. Today the four-lane Highway 4 crosses the bridge.
The short distance between the railway and poor planning of the Ad Halom junction on Highway 4 cause traffic jams. The first stage of new Ashdod Interchange, intended to solve the problem, was opened in October 2008.
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