Bab-el-Mandeb in the context of "Arabian Sea"

The Red Sea is a sea inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab-el-Mandeb Strait and the Gulf of Aden. To its north lies the Sinai Peninsula, the Gulf of Aqaba, and the Gulf of Suez, which leads into to the Suez Canal. It is underlain by the Red Sea Rift, which is part of the Great Rift Valley.

The Red Sea has a surface area of roughly 438,000 km (169,000 sq mi), is about 2,250 km (1,400 mi) long, and 355 km (221 mi) wide at its widest point. It has an average depth of 490 m (1,610 ft), and in the central Suakin Trough, it reaches its maximum depth of 3,040 m (9,970 ft).

The Gulf of Aden (Arabic: خليج عدن; Somali: Gacanka Cadmeed) is a deepwater gulf of the Indian Ocean between Yemen to the north, the Arabian Sea to the east, Djibouti to the west, and the Guardafui Channel, the Socotra Archipelago, Puntland in Somalia and Somaliland to the south. In the northwest, it connects with the Red Sea through the Bab-el-Mandeb strait, and it connects with the Arabian Sea to the east. To the west, it narrows into the Gulf of Tadjoura in Djibouti. The Aden Ridge lies along the middle of the gulf, and tectonic activity at the ridge is causing the gulf to widen by about 15 mm (0.59 in) per year.

The ancient Greeks regarded the gulf as one of the most important parts of the "Erythraean Sea". It later came to be dominated by Muslims, as the area around the gulf converted to Islam. From the late 1960s onwards, there was an increased Soviet naval presence in the Gulf. The importance of the Gulf of Aden declined while the Suez Canal was closed, but it was revitalized when the canal was reopened in 1975, after being deepened and widened by the Egyptian government.

The Gulf of Tadjoura (Somali: Gacanka Tajuura; Arabic: خليج تجرة) is a gulf or basin of the Indian Ocean in the Horn of Africa. It lies south of the straits of Bab-el-Mandeb, or the entrance to the Red Sea, at 11°42′N 43°00′E / 11.7°N 43.0°E / 11.7; 43.0. The gulf has many fishing grounds, extensive coral reefs, and abundant pearl oysters. Most of its coastline is the territory of Djibouti, except for a short stretch on the southern shore, which is part of the territory of Somaliland.

The Gulf’s other marine habitats include sea grass beds, salt pans and mangroves.

Yemen is located in West Asia, at the southern tip of the Arabian Peninsula, between Oman and Saudi Arabia. It is situated at the entrance to the Bab-el-Mandeb Strait, which links the Red Sea to the Indian Ocean (via the Gulf of Aden) and is one of the most active and strategic shipping lanes in the world. Yemen has an area of 455,503 square kilometres (175,871 sq mi), including the islands of Perim at the southern end of the Red Sea and Socotra at the entrance to the Gulf of Aden. Yemen's land boundaries total 1,746 kilometres (1,085 mi). Yemen borders Saudi Arabia to the north (1,458 km or 906 mi) and Oman to the northeast (288 km or 179 mi). Through the Socotra island, Yemen also shares borders with the Guardafui Channel and the Somali Sea.

Aden (Arabic: عَدَنْ‎, romanized: ʿAdan; IPA: [ʕa.dan]) is a port city located in Yemen in the southern part of the Arabian peninsula, on the north coast of the Gulf of Aden, positioned near the eastern approach to the Red Sea. It is situated approximately 170 km (110 mi) east of the Bab-el-Mandeb strait. With its strategic location on the coastline, Aden serves as a gateway between the Red Sea and the Arabian Sea, making it a crucial maritime hub connecting Africa, Asia, and the Middle East. As of September 2025, Aden has a population of approximately 1,154,000 residents, making it one of the largest cities in Yemen.Aden is the capital and principal part of Aden Governorate, encompassing eight districts. During the colonial period, the name Aden referred to the area along the north coast of the gulf, encompassing Tawahi, Mualla, Crater, and much of Khor Maksar district. The western harbour peninsula, known as Little Aden, now falls within the Al Buraiqeh district.

Before gaining independence, Aden comprised distinct sectors: Crater, the original port; Ma'alla, the modern port; Tawahi, formerly "Steamer Point"; and Gold Mohur resorts. Khormaksar, on the isthmus connecting Aden to the mainland, hosts diplomatic missions, Aden University's main offices, and Aden International Airport. On the mainland, sectors include Sheikh Othman, an old oasis area; Al-Mansura, a British-planned town; and Madinat ash-Sha'b (formerly Madinat al-Ittihad), the former capital of the South Arabian Federation, now housing a large power/desalination facility and additional Aden University faculties.

The String of Pearls is a geopolitical hypothesis proposed by United States political researchers in 2004. The term refers to the network of Chinese military and commercial facilities and relationships along its sea lines of communication which extend from the Chinese mainland to Port Sudan in the Horn of Africa. The sea lines run through several major maritime choke points such as the Strait of Mandeb, the Strait of Malacca, the Strait of Hormuz, and the Lombok Strait as well as other strategic maritime centres in Somalia and the littoral South Asian countries of Pakistan, Sri Lanka, Bangladesh, and the Maldives.

Many commentators in India believe this plan, together with the China–Pakistan Economic Corridor and other parts of China's Belt and Road Initiative under Chinese Communist Party general secretary Xi Jinping, is a threat to India's national security. Such a system would encircle India and threaten its power projection, trade, and potentially territorial integrity. Furthermore, China's support for India's traditional enemy of Pakistan and its Gwadar Port is viewed as a threat, compounded by fears that China may develop an overseas naval military base in Gwadar, which could allow China to conduct expeditionary warfare in the Indian Ocean Region. From the east, the deep-water port of Kyaukpyu is also viewed with a similar concern. The first comprehensive academic analyses of Chinese plan and its security implications for New Delhi was undertaken in February 2008 by an active-duty Indian naval officer. Antedating China's anti-piracy naval deployment in the Indian Ocean beginning in December 2008, and the ensuing acquisition of its first overseas military base in Djibouti in August 2017, his analysis predicting China's "permanent military presence" in the Indian Ocean is viewed by Indian policymakers as prescient. Accordingly, India has since been making moves of various types to counter the threat.

North Yemen (Arabic: اليمن الشمالي, romanized: al-Yaman al-šamāliyya) is a term used to describe the Kingdom of Yemen (1918–1962), the Yemen Arab Republic (1962–1990), and the regimes that preceded them and exercised sovereignty over that region of Yemen. Its capital was Sanaa from 1918 to 1948 and again from 1962 to 1990. Located in the southwestern part of the Arabian Peninsula, the area of the region (Upper Yemen) is 195,000 square kilometers, it used to have a population of about thirteen million people prior to the Yemeni unification. It was bordered to the north by Saudi Arabia, to the south and east by South Yemen, to the west by the Red Sea, and to Bab al-Mandab in the southwest.

North Yemen was admitted to the United Nations on September 30, 1947. In 1962, the country fought a bloody civil war that ended with the abolition of the monarchy and the creation of a republic in 1970. It was one of the predecessor states of the Republic of Yemen, alongside South Yemen, until its eventual unification in 1990.

Perim (Arabic: بريم, romanized: Barīm), also called Mayyun (Arabic: جزيرة ميون) in Arabic, is a Yemeni volcanic island in the Strait of Mandeb at the south entrance into the Red Sea, off the south-west coast of Yemen. It administratively belongs to Dhubab District or Bab al-Mandab District, Taiz Governorate. The island of Perim divides the strait of Mandeb into two channels.

The island, as a dependency of Aden colony, was a part of the British Empire between 1857 and 1967.