Sallum in the context of "Egypt–Libya border"

Marmarica (Ancient Greek: Μαρμαρική, Arabic: مراقيه, romanized: Maraqiyah) in ancient geography was a littoral area in Ancient Libya, located between Cyrenaica and Aegyptus. It corresponds to what is now the Libya and Egypt frontier, including the towns of Bomba (ancient Phthia), Timimi (ancient Paliurus), Tobruk (ancient Antipyrgus), Acroma (ancient Gonia), Bardiya, As-Salum, and Sidi Barrani (ancient Zygra). The territory stretched to the far south, encompassing the Siwa Oasis, which at the time was known for its sanctuary to the deity Amun. The eastern part of Marmarica, by some geographers considered a separate district between Marmarica and Aegyptus, was known as Libycus Nomus. In late antiquity, Marmarica was also known as Libya Inferior, while Cyrenaica was known as Libya Superior.

Libya is found in Africa and is located west of the Nile, more precisely west of the mouth of the Nile at Canopus. The Periplus of Pseudo-Scylax names the Adyrmachidae as the first people of Libya (Africa).Marmarica proper was delimited towards the east by the escarpment of Catabathmus Magnus, now known as Akabah el-Kebir, at Salum.

Marsa Matrouh (Arabic: مرسى مطروح), also transliterated as Marsa Matruh (Standard Arabic Marsā Maṭrūḥ, [ˈmæɾsæ mɑtˤˈɾuːħ]), is a port in Egypt and the capital of Matrouh Governorate. It is located 240 km (150 mi) west of Alexandria and 222 km (138 mi) east of Sallum on the main highway from the Nile Delta to the Libyan border. The city is also accessible from the south via another highway running through the Western Desert towards Siwa Oasis and Bahariya Oasis.

Mersa Matruh was a major grain port under the Romans and a military base of the British Empire. During World War II, several battles were fought around its environs as the Italo-German Panzer Army Africa attempted to capture the port. It fell to the Axis during the Battle of Mersa Matruh but was recaptured following the Second Battle of El Alamein.

The Egyptian–Libyan War, also known as the Four Day War (Arabic: حرب الأيام الأربعة), was a short border war fought between Libya and Egypt that lasted from 21 to 24 July 1977. The conflict stemmed from a deterioration in relations that had occurred between the two states after Egyptian President Anwar Sadat had rebuffed Libyan leader Muammar Gaddafi's entreaties to unify their countries and had pursued a peace settlement with Israel in the aftermath of the Yom Kippur War in 1973. Soon thereafter Libya began sponsoring dissidents and assassination plots to undermine Sadat, and Egypt responded in kind to weaken Gaddafi. In early 1976 Gaddafi dispatched troops to the Egyptian frontier where they began clashing with border guards. Sadat responded by moving many troops to the area, while the Egyptian General Staff drew up plans for an invasion to depose Gaddafi.

Clashes along the border intensified in July 1977. On 21 July a Libyan tank battalion raided the town of Sallum. The Egyptian forces ambushed it and subsequently launched a large counter-attack, conducting airstrikes against Gamal Abdel Nasser Airbase and sending a mechanised force 24 kilometres (15 mi) into Libyan territory before withdrawing. Over the next two days, heavy artillery fire was exchanged across the border, while Egyptian jets and commandos raided Libyan locales. On 24 July the Egyptians launched a larger raid against Nasser Airbase and struck Libyan supply depots. Under significant pressure from the United States to end the attacks, and attempts from President of Algeria Houari Boumediène and Palestine Liberation Organisation leader Yasser Arafat to mediate a solution, Sadat suddenly declared a ceasefire. Sporadic fighting occurred over the next few days as Egyptian troops withdrew across the border. Relations between the two countries remained tense, and, though a formal agreement was never reached, both upheld a truce and gradually withdrew their forces from the border. Gaddafi softened his rhetoric against Egypt in the following years but actively rallied other Arab states to isolate the country.

The Frontier Wire was a 271 km (168 mi) obstacle in Italian Libya, along the length of the border of British-held Egypt, running from El Ramleh, in the Gulf of Sollum (between Bardia and Sollum) south to Jaghbub parallel to the 25th meridian east, the Libya–Egypt and Libya–Sudan borders. The frontier wire and its line of covering forts was built by the Italians during the Second Italo-Senussi War (1923–1931), as a defensive system to contain the Senussi population, who crossed from Egypt during their resistance against Italian colonisers.

From the Italian declaration of war on 10 June 1940 until the conquest of Libya by the British in 1942, it was the scene of military engagements between Italian, British and German forces as the fighting ebbed and flowed across the frontier. While the installation was reasonably effective against the poorly equipped Senussi, it was ineffective against the well-equipped conventional army fielded by the British.

31°30′N 25°11′E / 31.500°N 25.183°E / 31.500; 25.183Halfaya Pass (Arabic: ممر حلفيا, romanized: Mamarr Ḥalfayā Egyptian Arabic pronunciation: [ma.marr ħal.fæyaː] ) is in northwest Egypt, 11.5 kilometres east of the border with Libya and 7.5 kilometres south of the other, more major pass in the ridge today. A 600-foot-high (180 m), narrow escarpment extends south then southeastwards for a total of 55 kilometres (34 mi) from a short distance east of the border. It hems in east-facing small harbour town of as-Salum, continuing as an east-facing sea cliff further north. Land to the east is lower than that to the west and the east side has steep slopes.

The pass is centred 1.6 miles (2.6 km) inland from the closest part of the shore. It makes for a subtle wind gap in the escarpment for the east-west land route. It made for the southern Mediterranean coastal road useful to Mediterranean civilizations until the pass at as-Salum was enlarged after World War II.

Fort Capuzzo (Italian: Ridotta Capuzzo) was a fort in the colony of Italian Libya, near the Libya–Egypt border, next to the Italian Frontier Wire. The Litoranea Balbo (Via Balbo) ran south from Bardia to Fort Capuzzo, 8 mi (13 km) inland, west of Sollum, then east across the Egyptian frontier to the port over the coastal escarpment. The fort was built during the Italian colonial repression of Senussi resistance in the Second Italo-Senussi War (1923–1931), as part of a barrier on the Libya–Egypt and Libya–Sudan borders.

The Frontier Wire and a line of forts including Fort Capuzzo were used to stop the Senussi from moving freely across the border. The fort had four crenellated walls enclosing a yard. Living quarters had been built around the edges and provided the base for border guards and Italian army armoured car patrols. A track ran south from the fort, just west of the frontier wire and the border, to Sidi Omar, Fort Maddalena and Giarabub. The fort changed hands several times during the Western Desert campaign (1940–1943) of the Second World War.