Territorial dispute in the context of "Egypt–Sudan border"

An island country, island state, or island nation is a country whose primary territory consists of one or more islands or parts of islands. Approximately 25% of all independent countries are island countries. Island countries are historically more stable than many continental states but are vulnerable to conquest by naval superpowers. Indonesia is the largest and most populated island country in the world (and the fourth most populated country overall).

There are great variations between island country economies: they may rely mainly on extractive industries, such as mining, fishing and agriculture, and/or on services such as transit hubs, tourism, and financial services. Many islands have low-lying geographies and their economies and population centers develop along coast plains and ports; such states may be vulnerable to the effects of climate change, especially sea level rise.

Territorial disputes have occurred throughout history, over lands around the world. Bold indicates one claimant's full control; italics indicates one or more claimants' partial control.

North Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of the Western Sahara in the west, to Egypt and Sudan's Red Sea coast in the east.

The most common definition for the region's boundaries includes Algeria, Egypt, Libya, Morocco, Tunisia, and Western Sahara, the territory disputed between Morocco and the partially recognized Sahrawi Arab Democratic Republic. The United Nations’ definition includes all these countries as well as Sudan. The African Union defines the region similarly, only differing from the UN in excluding the Sudan and including Mauritania. The Sahel, south of the Sahara Desert, can be considered as the southern boundary of North Africa. North Africa includes the Spanish cities of Ceuta and Melilla, and the plazas de soberanía. It can also be considered to include Malta, as well as other Italian, Portuguese, and Spanish regions such as Lampedusa and Lampione, Madeira, and the Canary Islands, which are all either closer to the African continent than Europe or as close to the African continent as Europe.

The Maghreb (/ˈmɑːɡrəb/; Arabic: ْاَلْمَغْرِب, romanized: al-Maghrib, lit. 'The place where the sun sets' [ælˈmaɣrɪb] ), also known as the Arab Maghreb (Arabic: اَلْمَغْرِبُ الْعَرَبِيُّ, romanized: al-Maghrib al-ʿArabi, lit. 'the Arab west') or the Greater Maghreb (Arabic: المغرب الكبير al-Maghrib al-Kabīr), and Northwest Africa, is the western part of the Arab world. The region comprises western and central North Africa, including Algeria, Libya, Mauritania, Morocco, and Tunisia. The Maghreb also includes the disputed territory of Western Sahara. As of 2018, the region had a population of over 100 million people.

The Maghreb is usually defined as encompassing much of the northern part of Africa, including a large portion of the Sahara Desert, but excluding Egypt and Sudan, which are considered to be located in the Mashriq—the eastern part of the Arab world. The traditional definition of the Maghreb—which restricted its scope to the Atlas Mountains and the coastal plains of Morocco, Algeria, Tunisia and Libya—was expanded in modern times to include Mauritania and the disputed territory of Western Sahara. During the era of al-Andalus on the Iberian Peninsula (711–1492), the Maghreb's inhabitants—the Muslim Maghrebis—were known by Europeans as the "Moors". The Greeks referred to the region as the "Land of the Atlas", referring to its Atlas Mountains.

Navassa Island (/nəˈvæsə/; Haitian Creole: Lanavaz; French: Île de la Navasse, sometimes la Navase) is an uninhabited island in the Windward Passage of the Caribbean Sea. Located east of Jamaica, south of Cuba, and 40 nautical miles (74 km; 46 mi) west of Jérémie on the Tiburon Peninsula of Haiti, it is subject to an ongoing territorial dispute between Haiti and the United States, the latter of which administers the island through the U.S. Fish and Wildlife Service.

The U.S. has claimed the island as an appurtenance since 1857, based on the Guano Islands Act of 1856. Haiti's claim over Navassa goes back to the Treaty of Ryswick in 1697 that recognized French, rather than Spanish, control of the western portion of the island of Hispaniola and other specifically named nearby islands. However, there was no mention of Navassa in the treaty detailing terms. Haiti's 1801 constitution claimed several nearby islands by name, among which Navassa was not listed, but also laid claim to "other adjacent islands", which Haiti maintains included Navassa. The U.S. claim to the island, first made in 1857, asserts that Navassa was not included among the unnamed "other adjacent islands" in the 1801 Haitian Constitution. Since the Haitian Constitution of 1874, Haiti has explicitly named "la Navase" as one of the territories it claims. It maintains that it has continuously been claimed as part of Haiti since 1801.

A border barrier, border fence or border wall is a separation barrier that runs along or near an international border. Such barriers are typically constructed for border control purposes such as curbing illegal immigration, human trafficking, and smuggling. Some such barriers are constructed for defence or security reasons. In cases of a disputed or unclear border, erecting a barrier can serve as a de facto unilateral consolidation of a territorial claim that can supersede formal delimitation. A border barrier does not usually indicate the location of the actual border, and is usually constructed unilaterally by a country, without the agreement or cooperation of the other country.

Examples of border walls include the ancient Great Wall of China, a series of walls separating China from nomadic empires to the north. The construction of border barriers increased in the early 2000s; half of all the border barriers built since World War II, which ended in 1945, were built after 2000.