Which one of the following pairs of countries fought wars over a region called Ogaden ?

1. Geography of the Horn of Africa (basic)

The Horn of Africa is a prominent peninsula in Northeast Africa that juts into the Arabian Sea and the Indian Ocean. Geographically, it is shaped like a rhinoceros horn, which gives it its evocative name. This region is a critical crossroads of global trade and a hotspot of both geological activity and biological diversity. Traditionally, the 'Horn' is composed of four primary countries, easily remembered by the mnemonic SEED: Somalia, Ethiopia, Eritrea, and Djibouti. The region is characterized by the massive Ethiopian Highlands, which were formed millions of years ago when a mantle plume caused the earth's crust to dome and fracture, leading to voluminous fissure-fed lava flows Physical Geography by PMF IAS, Hotspot Volcanism, p.166.

From a tectonic perspective, this is one of the most unstable and fascinating places on Earth. It sits atop the Afar Triple Junction, where three tectonic plates (the Arabian, Nubian, and Somalian plates) are pulling away from each other. This movement has created the Great Rift Valley, which splits the Ethiopian Highlands into eastern and western sections Physical Geography by PMF IAS, Divergent Boundary, p.129. While much of the Horn is arid—particularly Somalia, which is recognized as a significant biodiversity hotspot for endemic species—the rugged highlands of Ethiopia provide a stark, cooler contrast to the dry coastal lowlands Environment and Ecology, Majid Hussain, BIODIVERSITY, p.8.

Politically, the region has been defined by its strategic location near the Bab-el-Mandeb strait and by internal territorial disputes. One of the most significant events in its modern political geography was the Ogaden War (1977–78). The Ogaden is a region in eastern Ethiopia inhabited primarily by ethnic Somalis. In 1977, Somalia attempted to annex this territory, leading to a major interstate conflict. Although Somalia initially occupied large parts of the region, Ethiopia eventually expelled the Somali forces with significant external military assistance, cementing the current borders that remain a point of tension today.

Sources: Physical Geography by PMF IAS, Hotspot Volcanism, p.166; Physical Geography by PMF IAS, Divergent Boundary, p.129; Environment and Ecology, Majid Hussain, BIODIVERSITY, p.8

2. Strategic Maritime Chokepoints: Red Sea and Bab-el-Mandeb (basic)

To understand world political geography, we must first understand chokepoints—narrow channels along widely used global sea routes that are critical for international trade and security. The Red Sea is a vital maritime corridor, and its southern entrance is guarded by a narrow strait known as the Bab-el-Mandeb (meaning 'Gate of Tears' in Arabic). This strait acts as a strategic bottleneck connecting the Red Sea to the Gulf of Aden and the broader Indian Ocean.

The strategic importance of this region cannot be overstated. It forms the southern half of the world's most critical shortcut: the Suez-Red Sea route. Before the Suez Canal was built, ships traveling from Europe to Asia had to circumnavigate the entire continent of Africa via the Cape of Good Hope. By using the Red Sea and Bab-el-Mandeb, the distance and time for global trade are drastically reduced FUNDAMENTALS OF HUMAN GEOGRAPHY, CLASS XII, Transport and Communication, p.62. This route serves more people and countries than any other, with key transit hubs like Aden (Yemen) and Port Said (Egypt) facilitating the flow of goods.

Feature	Suez-Red Sea Route	Cape of Good Hope Route
Geography	Narrow, transcontinental shortcut	Long, open-ocean route around Africa
Key Chokepoint	Bab-el-Mandeb & Suez Canal	None (Open Sea)
Strategic Value	High (shortest link between Europe and Asia)	Alternative if Suez/Red Sea is blocked

Beyond trade, the Bab-el-Mandeb has unique physical and security characteristics. Geologically, a submarine barrier or sill exists at the strait, reaching a height of about 366 meters. This barrier prevents the easy mixing of waters, leading to significant temperature and salinity differences between the subsurface waters of the Red Sea and the Indian Ocean Physical Geography by PMF IAS, Ocean temperature and salinity, p.517. Politically, the region is highly sensitive. The Gulf of Aden and the waters around Somalia have historically been hotspots for maritime piracy, necessitating international naval protection to keep this vital trade artery open Geography of India, India–Political Aspects, p.80.

Sources: FUNDAMENTALS OF HUMAN GEOGRAPHY, CLASS XII, Transport and Communication, p.62; Physical Geography by PMF IAS, Ocean temperature and salinity, p.517; Geography of India, India–Political Aspects, p.80

3. Historical Context: The Berlin Conference and African Borders (intermediate)

To understand the current political map of Africa, we must travel back to the late 19th century, a period known as the 'Scramble for Africa'. Before this era, European presence was largely confined to coastal trading posts. However, between 1880 and 1890, a competitive land grab began as European powers sought resources and strategic dominance Themes in world history, Changing Cultural Traditions, p.130. To prevent a full-scale war between themselves over these territories, the major European powers convened at the Berlin Conference in 1884-85.

The hallmark of this conference was the arbitrary nature of the partitioning. If you look at a modern map of Africa, you will notice that many international borders run in perfectly straight lines. This is because the rival European powers literally used rulers on a map to demarcate their respective territories, often without ever setting foot in the interior of the regions they were dividing India and the Contemporary World – II, The Making of a Global World, p.61. Britain and France secured the largest shares, while newer powers like Germany and Belgium also established significant colonial footprints.

This "geometric" approach to political geography ignored the organic realities of the continent. The new borders frequently sliced through unified ethnic groups, linguistic communities, and traditional kingdoms, or conversely, forced historical rivals into the same administrative unit. For the local populations, these lines were not just ink on a map; they were physical barriers that disrupted ancient economic patterns. Pastoralist communities, who relied on seasonal migration, found their ancestral grazing routes suddenly blocked by international frontiers, leading to immense hardship and social friction India and the Contemporary World - I, Pastoralists in the Modern World, p.111.

Sources: Themes in world history, Changing Cultural Traditions, p.130; India and the Contemporary World – II, The Making of a Global World, p.61; India and the Contemporary World - I, Pastoralists in the Modern World, p.111

4. Regional Geopolitics: The Grand Ethiopian Renaissance Dam (GERD) (intermediate)

The Grand Ethiopian Renaissance Dam (GERD) is one of the most significant geopolitical flashpoints in modern Africa, centered on the waters of the Nile River. To understand the conflict, we must first look at the river's geography. The Nile is formed by two main tributaries: the White Nile and the Blue Nile. These two great streams meet at Khartoum, the capital of Sudan Certificate Physical and Human Geography, Settlements and Towns, p.317. While the White Nile is longer, the Blue Nile—which originates in the Ethiopian Highlands—contributes over 80% of the river's water during the rainy season. Ethiopia’s decision to build a massive gravity dam on this tributary has created a complex 'hydropolitical' struggle between upstream and downstream nations. For Ethiopia, the GERD is a ticket out of poverty. The region has historically suffered from extensive desertification and chronic hunger, often being classified in the 'alarming' category for food insecurity Environment and Ecology, Majid Hussain, Contemporary Socio-Economic Issues, p.21. The Sahel region, which includes parts of Ethiopia and its neighbors, is prone to severe droughts and famines that have claimed millions of lives over the decades Environment and Ecology, Majid Hussain, Natural Hazards and Disaster Management, p.83. By harnessing the Blue Nile, Ethiopia aims to become Africa's largest power exporter, providing electricity to its citizens and stabilizing its economy against environmental degradation Environment and Ecology, Majid Hussain, Environmental Degradation and Management, p.17. However, this project creates an existential anxiety for Egypt. Unlike ephemeral streams that only flow during rains, the Nile is a perennial river that Egypt has relied on for millennia as its primary water source INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Drainage System, p.17. Egypt fears that Ethiopia’s control over the flow—especially during the periods when the reservoir is being filled—could lead to water shortages, devastating Egyptian agriculture and domestic supply.

Stakeholder	Primary Objective	Core Concern
Ethiopia (Upstream)	Hydroelectric power generation and economic development.	Sovereign right to use natural resources within its borders.
Egypt (Downstream)	Water security and maintaining historical water shares.	Reduction in Nile flow affecting irrigation and drinking water.
Sudan (Midstream)	Flood control and access to cheap electricity.	Dam safety and the technical coordination of water release.

Sources: Certificate Physical and Human Geography, Settlements and Towns, p.317; Environment and Ecology, Majid Hussain, Contemporary Socio-Economic Issues, p.21; Environment and Ecology, Majid Hussain, Natural Hazards and Disaster Management, p.83; Environment and Ecology, Majid Hussain, Environmental Degradation and Management, p.17; INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Drainage System, p.17

5. Modern Conflicts: South Sudan and Eritrea's Independence (intermediate)

The political geography of the Horn of Africa and the Nile Basin has been drastically reshaped by two of the most significant secessionist movements in modern history: the independence of Eritrea (1993) and South Sudan (2011). These conflicts weren't just about borders; they were deep-seated struggles over identity, resources, and political representation. To understand these, we must look at how colonial-era boundaries often ignored ethnic and religious realities, a theme common in many post-colonial states Themes in world history, History Class XI (NCERT 2025 ed.), Changing Cultural Traditions, p.130. Eritrea's Independence from Ethiopia Eritrea was an Italian colony until World War II (noting that Italy also invaded Ethiopia in 1935 History, class XII (Tamilnadu state board 2024 ed.), Outbreak of World War II and its Impact in Colonies, p.220). After the war, the UN federated Eritrea with Ethiopia, but tensions rose when Ethiopia's Emperor Haile Selassie eventually dissolved the federation and annexed Eritrea. This sparked a 30-year war of independence (1961–1991). Following the fall of the Ethiopian military regime (the Derg) in 1991, a UN-monitored referendum was held, leading to Eritrea's official independence in 1993. However, the two nations remained locked in a bitter border dispute, particularly over the town of Badme, reflecting the broader challenge of defining borders in linguistically and ethnically diverse regions Indian Constitution at Work, Political Science Class XI (NCERT 2025 ed.), FEDERALISM, p.169. The Birth of South Sudan South Sudan’s struggle was defined by a sharp divide between the Arab-Muslim north and the predominantly Christian and Animist south. Geographically, the region is dominated by the Sudan Climate (Savanna), a transitional zone between desert and rainforest Physical Geography by PMF IAS, Climatic Regions, p.436. Decades of civil war—the longest in African history—were fueled by the south’s marginalization and disputes over oil revenues. The 2005 Comprehensive Peace Agreement (CPA) finally paved the way for a referendum. In 2011, the people of South Sudan voted overwhelmingly for independence, making it the world's newest nation. Despite this, both Sudan and South Sudan continue to clash over the oil-rich Abyei region, proving that the "carving out" of new states often leaves unresolved territorial legacies Indian Constitution at Work, Political Science Class XI (NCERT 2025 ed.), FEDERALISM, p.169.

Country	Independent From	Year	Primary Driver of Conflict
Eritrea	Ethiopia	1993	Annexation and loss of federal autonomy.
South Sudan	Sudan	2011	Ethnic/religious marginalization and oil resources.

Sources: Themes in world history, History Class XI (NCERT 2025 ed.), Changing Cultural Traditions, p.130; Physical Geography by PMF IAS, Climatic Regions, p.436; Indian Constitution at Work, Political Science Class XI (NCERT 2025 ed.), FEDERALISM, p.169; History, class XII (Tamilnadu state board 2024 ed.), Outbreak of World War II and its Impact in Colonies, p.220

6. Ethnic Geopolitics: The 'Greater Somalia' Concept (exam-level)

The concept of 'Greater Somalia' (or Soomaaliwayn) is a quintessential example of ethnic nationalism—the belief that a nation should be defined by its shared heritage, language, and culture rather than by existing political borders. In the Horn of Africa, this vision seeks to unify all Somali-inhabited territories into a single sovereign state. As we see in global politics, the language of nationalism is often used by groups to either seek a 'pan-union' or to separate from existing states Political Theory, Class XI (NCERT 2025 ed.), Nationalism, p.99. For Somalia, this vision is symbolized by the five-pointed star on its national flag, representing the five regions where Somalis traditionally reside: the former Italian Somaliland, British Somaliland (which together form modern Somalia), French Somaliland (now Djibouti), the Ogaden region of Ethiopia, and the North Eastern Province of Kenya.

The geopolitical tension arises because these ethnic boundaries do not align with the territorial boundaries established during the colonial 'Scramble for Africa.' This discrepancy led to one of the most significant interstate conflicts in modern African history: the Ogaden War (1977–78). Similar to how the partition of the Indian subcontinent involved mapping boundaries that often ignored local complexities Politics in India since Independence, Class XII (NCERT 2025 ed.), Challenges of Nation Building, p.24, the borders in the Horn of Africa left the Somali-inhabited Ogaden plateau within the political jurisdiction of Ethiopia. In 1977, the Somali government under Siad Barre launched a full-scale invasion to 'liberate' the Ogaden, initially seizing large territories before being repelled by Ethiopian forces backed by massive Soviet and Cuban military intervention.

From a geopolitical perspective, the 'Greater Somalia' project failed to materialize due to the international community's rigid adherence to the principle of uti possidetis—the idea that colonial borders should remain sacrosanct to avoid continental chaos. The aftermath of the Ogaden War was devastating; it bankrupted Somalia and fueled internal clan divisions that eventually led to the state's collapse in 1991. Today, the region remains a complex landscape where physical geography (like the Ethiopian Highlands and the Afar Triple Junction Physical Geography by PMF IAS, Divergent Boundary, p.128) meets the volatile reality of ethnic geography, making the Horn of Africa a focal point of global security studies.

Sources: Political Theory, Class XI (NCERT 2025 ed.), Nationalism, p.99; Politics in India since Independence, Class XII (NCERT 2025 ed.), Challenges of Nation Building, p.24; Physical Geography by PMF IAS, Divergent Boundary, p.128

7. The Ogaden Region and the 1977-78 War (exam-level)

The Ogaden Region is a vast, arid territory located in the eastern part of Ethiopia, bordering Somalia. Historically, the region has been a geopolitical flashpoint because, while it is administratively part of Ethiopia, its population is predominantly ethnic Somali. This demographic reality fueled the concept of 'Pan-Somalism'—the desire to unite all Somali-inhabited territories in the Horn of Africa into a single 'Greater Somalia.'

The tension culminated in the Ogaden War (1977–1978). The conflict arose during a period of extreme vulnerability for Ethiopia. Following the 1974 revolution that overthrew Emperor Haile Selassie, Ethiopia was led by a Marxist military junta known as the Derg. Sensing an opportunity to realize the dream of Greater Somalia while Ethiopia was distracted by internal power struggles and secessionist movements, Somali President Siad Barre launched a full-scale invasion of the Ogaden in July 1977. This illustrates a classic pattern in post-colonial states where external wars and internal separatist threats often merge, posing a dual challenge to national security Contemporary World Politics, Security in the Contemporary World, p.68.

The war is particularly famous for its Cold War irony. Initially, the USSR supported Somalia and the USA supported Ethiopia. However, as the Derg regime moved closer to Moscow, the superpowers effectively 'swapped' partners. The defeat of Somalia led to long-term instability in the region, contributing to the eventual collapse of Siad Barre’s government years later and the ongoing humanitarian challenges in the Horn of Africa. These interstate conflicts over borders and control of populations were frequent during the 20th century as new states grappled with colonial-era boundaries Contemporary World Politics, Security in the Contemporary World, p.68.

Sources: Contemporary World Politics, Security in the Contemporary World, p.68; History, class XII (Tamilnadu state board 2024 ed.), Imperialism and its Onslaught, p.199

8. Solving the Original PYQ (exam-level)

Now that you have mastered the map of the Horn of Africa and the historical patterns of colonial border demarcation, this question serves as the perfect application of those concepts. The Ogaden region is a classic example of how ethnic distribution often ignores political boundaries. By understanding that the region is primarily inhabited by Somali-speaking populations but located within the sovereign borders of Ethiopia, you can immediately identify the geopolitical friction point. This transition from static map-reading to dynamic conflict analysis is exactly how UPSC tests your ability to link geography with historical and current affairs.

To arrive at the correct answer, recall the Ogaden War (1977-78), a pivotal Cold War-era conflict where Somalia attempted to annex this territory to fulfill the vision of 'Greater Somalia.' Since the region is a plateau in eastern Ethiopia, the primary actors must be the state holding the land and the state claiming it based on ethnicity. Therefore, (B) Ethiopia and Somalia is the correct answer. As your coach, I suggest you always look for territorial irredentism—the desire of a state to reclaim land inhabited by its ethnic kin—as a recurring theme in such questions.

Beware of the traps in the other options. UPSC often selects countries from the same sub-region to confuse candidates who rely on vague proximity rather than precise facts. While Kenya and Somalia have had maritime disputes and the Shifta War, the term 'Ogaden' is strictly specific to the Ethiopian interior. Similarly, while Eritrea and Ethiopia have fought over the Badme region, and Sudan has border issues like Al-Fashaga, neither involves the Ogaden. According to Britannica, the 1977 invasion remains the definitive historical marker for this specific geographic term, distinguishing it from other Horn of Africa disputes.