Yom Kippur War was fought between which sides/countries?

1. Genesis of the Arab–Israeli Conflict (basic)

The Arab–Israeli conflict is a deeply rooted struggle that began in the late 19th and early 20th centuries, primarily over the territory of Palestine. At its core, it is a clash of two powerful nationalist movements: Zionism, the movement for the self-determination of the Jewish people in their ancestral homeland, and Arab Nationalism, which sought independence for the indigenous Arab population from colonial rule. While both groups have historical and religious ties to the land, the modern conflict was set in motion during World War I when the British Empire issued the Balfour Declaration (1917), expressing support for a 'national home for the Jewish people' in Palestine.

Following World War I, Britain governed the region under a Mandate from the League of Nations. During this period, Jewish immigration increased—driven by the rise of Nazi Germany and the horrors of the Holocaust—leading to heightened tensions and frequent violence between the Jewish and Arab communities. By the end of World War II, the British were unable to maintain order and handed the problem over to the newly formed United Nations. In November 1947, the UN passed Resolution 181, which proposed the partition of Palestine into independent Jewish and Arab states, with Jerusalem under an international regime History, class XII (Tamilnadu state board), p.255.

The Jewish leadership accepted the partition plan, but the Arab leadership rejected it, arguing it violated the rights of the majority Arab population. This disagreement led to immediate civil strife. On May 14, 1948, as British forces prepared to withdraw, the State of Israel was formally declared. The very next day, a coalition of surrounding Arab states invaded, marking the beginning of the 1948 Arab–Israeli War. This inaugural conflict established the geopolitical boundaries for decades and created a massive refugee crisis, setting the stage for subsequent wars in 1956, 1967, and 1973 History, class XII (Tamilnadu state board), p.262.

Milestone	Significance
Balfour Declaration (1917)	British support for a Jewish 'national home'.
UN Partition Plan (1947)	Proposed two-state solution; accepted by Jews, rejected by Arabs.
Declaration of Independence (1948)	Formal creation of Israel; triggered the first major Arab-Israeli War.

Sources: History, class XII (Tamilnadu state board), The World after World War II, p.255; History, class XII (Tamilnadu state board), The World after World War II, p.262

2. The 1967 Six-Day War and Territorial Shifts (intermediate)

The 1967 Six-Day War remains one of the most pivotal events in modern Middle Eastern history, fundamentally redrawing the map of the region in less than a week. To understand this conflict, we must look at the escalating tensions of the mid-1960s. Following the 1956 Suez Crisis, a fragile peace existed, but by 1967, Arab nationalism led by Egyptian President Gamal Abdel Nasser reached a fever pitch. Mobilization of Egyptian forces in the Sinai, the removal of UN peacekeepers, and the blockade of the Straits of Tiran (Israel’s vital shipping lane) led Israel to launch a massive pre-emptive strike on June 5, 1967.

The speed of the Israeli victory was staggering. In the first few hours, the Israeli Air Force destroyed the bulk of the Egyptian air fleet on the ground, followed by similar successes against Syria and Jordan. This air superiority allowed Israeli ground forces to advance rapidly on three fronts. As noted in History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.255, by the time a ceasefire was signed on June 10, Israel had tripled the size of the territory under its control.

The territorial shifts were profound and continue to define the geopolitics of the region today. Israel occupied territories from three different Arab nations:

Territory Seized	Captured From	Strategic Significance
Sinai Peninsula & Gaza Strip	Egypt	Gave Israel a massive buffer zone and control over the Suez approach.
West Bank & East Jerusalem	Jordan	Included sites of immense religious and historical importance.
Golan Heights	Syria	A high-ground plateau overlooking northern Israel, vital for security.

The human cost was immense. Hundreds of thousands of Palestinians were forced into exile, joining those who had fled during the 1948 war History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.255. This displacement and the subsequent military occupation led to the Palestine Liberation Organisation (PLO), led by Yasser Arafat, moving from a clandestine group to a prominent international political force engaged in a long-term struggle History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.256.

Sources: History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.255; History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.256

3. Pan-Arabism and Regional Power Dynamics (intermediate)

To understand the Middle East in the 20th century, we must first grasp Pan-Arabism — the powerful ideology that the Arab people, stretching from the Atlantic Ocean to the Arabian Sea, constitute a single nation that should be politically united. Unlike many nationalist movements that seek to separate from a larger state (like the Kurds or the Basques), Pan-Arabism was a unifying force that hoped to merge existing countries into a single 'Arab Union' Political Theory, Class XI (NCERT 2025 ed.), Nationalism, p.99. At its peak, this wasn't just a dream; it manifested in the United Arab Republic (1958–1961), a short-lived political union between Egypt and Syria.

The face of this movement was Gamal Abdel Nasser of Egypt. Nasser was a titan of the mid-20th century, serving as a founding pillar of the Non-Aligned Movement (NAM) alongside India’s Jawaharlal Nehru and Yugoslavia’s Josip Broz Tito A Brief History of Modern India (SPECTRUM), The Evolution of Nationalist Foreign Policy, p.626. However, the Arab world was far from a monolith. A deep rift existed, often called the 'Arab Cold War,' which divided the region into two camps with very different visions for the future:

Feature	Revolutionary Republics	Conservative Monarchies
Key States	Egypt, Syria, Iraq, Algeria	Saudi Arabia, Jordan, Kuwait
Ideology	Secular, Socialist-leaning, Pan-Arabist	Traditionalist, Monarchical, Religious-leaning
Cold War Lean	Closer to the Soviet Union (USSR)	Closer to the United States (USA)

This internal division significantly impacted the Arab–Israeli conflict. While all Arab states officially opposed the creation and expansion of Israel History, class XII (Tamilnadu State Board), The World after World War II, p.255, they often competed with one another for leadership of the 'Arab cause.' Leaders like Nasser used aggressive rhetoric against Israel to solidify their Pan-Arab credentials and pressure the conservative monarchies to follow their lead. This rivalry meant that Arab military responses were often coordinated poorly, as kings and presidents frequently distrusted each other as much as they distrusted the common enemy. For instance, during various conflicts, countries like Jordan or Saudi Arabia often maintained a more cautious or neutral stance compared to the revolutionary fervor of Egypt and Syria A Brief History of Modern India (SPECTRUM), After Nehru..., p.701.

Sources: Political Theory, Class XI (NCERT 2025 ed.), Nationalism, p.99; A Brief History of Modern India (SPECTRUM), The Evolution of Nationalist Foreign Policy, p.626; A Brief History of Modern India (SPECTRUM), After Nehru..., p.701; History, class XII (Tamilnadu State Board), The World after World War II, p.255

4. Cold War Geopolitics in the Middle East (intermediate)

During the Cold War, the Middle East was transformed from a regional arena of territorial disputes into a critical chessboard for global bipolarity. The United States and the Soviet Union viewed every local conflict through the lens of containment and influence. To secure the region, the U.S. implemented the Truman Doctrine, which focused on providing financial and military aid to prevent the spread of communism. A primary tool for this was the 1955 Baghdad Pact (later known as CENTO), an alliance including Iraq, Turkey, Britain, Pakistan, and Iran, specifically designed to "check communist influence" in the region History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.249.

The Arab–Israeli conflict became a series of surrogate wars (or proxy wars), where the superpowers supported opposing sides to avoid a direct, potentially nuclear, confrontation. For instance, the Soviet Union supplied advanced weaponry and diplomatic backing to Arab nationalist regimes like Egypt and Syria, while the United States emerged as the primary military and economic benefactor for Israel History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.250. This dynamic peaked during the Yom Kippur War (1973), when a surprise attack by Egyptian and Syrian forces led to massive resupply efforts by both the U.S. and USSR, briefly threatening to escalate into a direct superpower clash.

Feature	United States Strategy	Soviet Union Strategy
Primary Goal	Containment of Communism; protecting oil routes.	Expanding influence; supporting anti-colonial movements.
Key Alliance	Baghdad Pact (CENTO) / Israel.	Treaties of Friendship with Egypt, Syria, and Iraq.
Key Doctrine	Truman Doctrine (Aid to resist subversion).	Support for Revolutionary Arab Nationalism.

Despite these tensions, the overarching threat of Mutual Assured Destruction (MAD) eventually forced both powers toward détente—a period of eased tensions and increased cooperation History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.258. This led to the SALT (Strategic Arms Limitation Talks), as the sheer economic cost of the arms race began to cripple the Soviet economy, which suffered from stagnating productivity and a lack of consumer goods by the late 1970s Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), The End of Bipolarity, p.3.

Sources: History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.249, 250, 258; Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), The End of Bipolarity, p.3

5. The 1973 Oil Crisis and OAPEC (exam-level)

In the world of geopolitics, oil is rarely just a commodity; it is a strategic instrument of power. During the Yom Kippur War (October 1973), the Arab-Israeli conflict spilled over into the global economy through what we now call the 1973 Oil Crisis. This event demonstrated that West Asia, which holds about 64 percent of the planet's known oil reserves, could influence global politics by controlling the tap Contemporary World Politics, Environment and Natural Resources, p.93. The crisis was triggered when the Organization of Arab Petroleum Exporting Countries (OAPEC)—a subset of the broader OPEC—proclaimed an oil embargo against nations perceived as supporting Israel during the war, most notably the United States and the Netherlands.

The impact of this "oil weapon" was immediate and seismic. Oil prices quadrupled almost overnight, leading to a phenomenon known as Cost-Push Inflation, where the rising cost of a fundamental input (energy) causes the general price level of goods and services to soar across the globe Indian Economy, Inflation, p.64. For many developing countries, including India, this was a moment of severe economic distress. The sudden spike in import bills led to a heavy deficit in the Balance of Payments (BOP), as India had to spend significantly more of its foreign exchange reserves just to keep its economy fueled Indian Economy, Balance of Payments, p.483.

Beyond the economics, the 1973 crisis fundamentally shifted the global balance of power. It marked the first time that a group of "Third World" nations successfully used an economic resource to challenge the dominance of Western industrial powers. It forced the West to realize its extreme vulnerability and dependence on West Asian energy, leading to a long-term shift in foreign policy and an intensified search for alternative energy sources and domestic oil production.

Sources: Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), Environment and Natural Resources, p.93; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Balance of Payments, p.483; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Inflation, p.64

6. Peace Treaties and Diplomatic Normalization (exam-level)

In the aftermath of the intense military confrontations of the 20th century, the shift from active warfare to diplomatic normalization represents a profound transition. While a ceasefire simply stops the shooting, a peace treaty aims to settle the underlying causes of conflict. In the Arab–Israeli context, this shift began most prominently after the Yom Kippur War (1973). Although the war was a fierce military engagement between Israel and a coalition led by Egypt and Syria, it shattered the status quo and opened a window for diplomacy that led to the 1978 Camp David Accords.

Diplomatic Normalization is the process by which two previously hostile nations establish official relations. It is much broader than a simple end to hostilities; it involves recognition of sovereignty, the exchange of ambassadors, and the opening of borders for trade and travel. For example, similar efforts in the Indian subcontinent, such as the Tashkent Declaration (1966), emphasized that disputes should be settled through peaceful means in accordance with the UN Charter, rather than through force Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM., After Nehru..., p.663.

The roadmap to durable peace often involves several layers of engagement:

• De-escalation: Moving troops away from borders and ending inflammatory rhetoric.
• Formal Recognition: Legally acknowledging the other state’s right to exist.
• Functional Cooperation: This includes "soft" normalization like cultural exchanges, movement of citizens, and economic cooperation Politics in India since Independence, NCERT 2025 ed., Indi External Relations, p.69.

Sources: Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM., After Nehru..., p.663; Politics in India since Independence, NCERT 2025 ed., Indi External Relations, p.69

7. The Yom Kippur War (October War) 1973 (exam-level)

The Yom Kippur War, also known as the October War or the Fourth Arab–Israeli War, broke out on October 6, 1973. It was a watershed moment in Middle Eastern history, primarily because it shattered the myth of Israeli invincibility that had persisted since the 1967 Six-Day War. The conflict was initiated by a coalition of Arab states led by Egypt and Syria, who launched a coordinated surprise attack on two fronts during the Jewish holy day of Yom Kippur (which coincided with the Muslim month of Ramadan). Their primary objective was not the total destruction of Israel, but the recapture of territories lost in 1967: the Sinai Peninsula for Egypt and the Golan Heights for Syria. In the south, Egyptian forces performed a sophisticated crossing of the Suez Canal, a vital waterway connecting the Red Sea with the Mediterranean History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.254. This operation successfully breached the Bar Lev Line, a series of Israeli fortifications. Simultaneously, Syrian tanks swept into the Golan Heights in the north. While the Suez Canal area is supported by freshwater links from the Nile and railway branches to Cairo FUNDAMENTALS OF HUMAN GEOGRAPHY, CLASS XII (NCERT 2025 ed.), Transport and Communication, p.63, the tactical environment was brutal, involving some of the largest tank battles in history. The war was also a high-stakes Cold War proxy conflict. The Soviet Union supplied the Arab states with advanced surface-to-air missiles (SAMs) that initially neutralized Israel's air superiority, while the United States launched "Operation Nickel Grass" to resupply Israel with massive amounts of hardware. This global dimension led to a major Oil Crisis, as Arab members of OPEC implemented an oil embargo against nations supporting Israel. This pressure, combined with India's consistent pro-Arab stand in regional diplomacy Rajiv Ahir, A Brief History of Modern India (2019 ed.), SPECTRUM, p.701, forced the international community to seek a diplomatic end to the hostilities. Although Israel eventually recovered and pushed back—crossing the Suez Canal into mainland Egypt and coming within range of Damascus—the initial Arab successes changed the regional psychology. The war ended with a UN-brokered ceasefire, eventually paving the way for the 1978 Camp David Accords, where Egypt became the first Arab nation to officially recognize Israel in exchange for the return of the Sinai Peninsula.

Sources: History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.254; FUNDAMENTALS OF HUMAN GEOGRAPHY, CLASS XII (NCERT 2025 ed.), Transport and Communication, p.63; Rajiv Ahir, A Brief History of Modern India (2019 ed.), After Nehru..., p.701

8. Solving the Original PYQ (exam-level)

You have just mastered the timeline of the Arab-Israeli Conflict, specifically how the 1967 Six-Day War fundamentally reshaped the borders of the Middle East. This question tests your ability to connect those territorial shifts to the subsequent 1973 flashpoint. The Yom Kippur War, often referred to as the Fourth Arab–Israeli War, represents the direct attempt by regional powers to overturn the status quo established in 1967. By synthesizing your knowledge of Cold War-era proxy tensions and regional grievances, you can see how the building blocks of Egyptian and Syrian military coordination led to this specific event.

To arrive at the correct answer, think like a strategist: why was the timing of this war so significant? It began on the holiest day of the Jewish calendar, aiming to catch Israel off guard during a period of national prayer and fasting. According to Britannica, the conflict was a coordinated two-front surprise attack: Egypt crossed the Suez Canal while Syria struck the Golan Heights. This historical context confirms that the primary combatants were (C) Israel, and Arab countries led by Egypt and Syria. The inclusion of other Arab states in a supporting role is a detail UPSC often uses to test the depth of your understanding beyond just the primary two nations.

UPSC often uses "plausible geography" traps to distract you. Option (A) refers to the long-standing tension between Turkey and Greece, often over Cyprus, while (B) involves the Balkan Wars of the 1990s—both occurring in entirely different geographic and chronological contexts. Option (D), the Iran-Iraq War, is a classic distractor because it involves two major Middle Eastern powers; however, that was a separate eight-year conflict in the 1980s that did not involve Israel. Discarding these options requires you to compartmentalize Middle Eastern history into its specific 20th-century geopolitical "slots."