Tobruk in the context of "Acroma"

The Libyan Sea (Latin: Libycum Mare; Arabic: البحر الليبي; Greek: Λιβυκό πέλαγος) is the portion of the Mediterranean Sea north of the African coast of ancient Libya, i.e. Cyrenaica, and Marmarica (the coast of what is now eastern Libya and western Egypt, between Tobruk and Alexandria).The region of the Libyan Sea located south of Crete is also known as the South Cretan Sea (Νότιο Κρητικό Πέλαγος).

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.

Butnan (Arabic: البطنان Al Buṭnān) sometimes called Tubruq District or Tobruk District from the former name, occasionally Marmarica, is an administrative district (shabiyah) in eastern Libya. Its capital city is Tobruk.

In the north, Butnan has a shoreline on the Mediterranean Sea. To the east, it borders Egypt's Matruh Governorate, along with a small border on the Al Wadi al Jadid Governorate in the far southeast. Domestically, it borders Derna in the northwest and Al Wahat in west and south. The most important settlements are Tobruk, Jaghbub and Bardia.

Timimi, At Timimi (Arabic: التميمي) or Tmimi, is a small village in northeastern Libya about 75 km east of Derna and 100 km west of Tobruk. It is on the eastern shores of the Libyan coastline of the Mediterranean Sea.

Sallum (Arabic: السلوم, romanized: as-Sallūm Egyptian Arabic pronunciation: [essælˈluːm] various transliterations include El Salloum, As Sallum or Sollum) is a harbourside village or town in Egypt. It is along the Egypt/Libyan short north–south aligned coast of the Mediterranean Sea in the far northwest corner of Egypt. It is, geodesically, eight kilometres (five miles) east of the border with Libya, and 128 kilometres (80 mi) from the notable port of Tobruk, Libya.

Sallum is mainly a Bedouin community of the families of merchants, fishermen and herdsmen. It has little tourist activity and few organized historical curiosities. It is a key trading center for the local Bedouin community. It has a World War II Commonwealth War Graves Commission cemetery and is 7.5 kilometres (4+3⁄4 mi) north of Halfaya Pass.

Sidi Barrani (Arabic: سيدي براني  pronounced [ˈsiːdi bɑɾˈɾɑːni]) is a town in Egypt, near the Mediterranean Sea, about 95 km (59 mi) east of the Egypt–Libya border, and around 240 km (150 mi) from Tobruk, Libya.

Named after Sidi es-Saadi el Barrani, a Senussi sheikh who was a head of its Zawiya, the village is mainly a Bedouin community. It has food, gasoline outlets and one small hotel, but virtually no tourist activity or visited historical curiosities. It is the site of an Egyptian Air Force base.