Section 15: Cold War Conflicts in Asia

The question asks for an accurate definition of the domino theory, articulated by Eisenhower in 1954 regarding Indochina. This was a central justification for US containment policy in Asia.

Domino theory held that a communist victory in one state would destabilize its neighbours, making each successive state more vulnerable — like a row of dominoes falling. It did not require evidence of central Soviet coordination; it was a model of sequential regional contagion rather than direct military conquest.

It is important for IB analysis to distinguish domino theory as a political belief shaping US policy from an objective description of events. Vietnamese communism was rooted in anti-colonial nationalism, and Moscow and Beijing did not always coordinate closely with Hanoi, suggesting the theory sometimes overstated communist unity and inevitability.

Option B correctly captures the sequential, regional cascade logic of the domino theory — one state falling leads to the next. The other options confuse it with NATO commitments, claims about central Soviet planning, or the specific role of direct military support.

We need the option that most accurately explains what the domino theory claimed — focusing on its logical structure, not its historical accuracy.

Option A describes NATO allies abandoning treaty obligations. This conflates Cold War dynamics in Europe with Asian policy and has nothing to do with the domino theory, which was specifically about the sequential spread of communism across neighbouring Asian states.

Option C claims the theory was about 'a single, centrally planned campaign' by the USSR and China. The domino theory did not depend on central coordination — it described a chain reaction of regional instability, not a unified military plan, making this option too specific and inaccurate.

Option D suggests communist movements could only succeed with 'direct Soviet military support.' This contradicts the domino theory's logic, which was about the spread of communism across borders through regional contagion, not a dependency on Soviet troops.

Option B — 'if one state fell to communism, neighbouring states would follow in succession' — is the precise and accurate definition of domino theory. It captures the sequential, regional logic that justified US intervention in Vietnam and elsewhere in Southeast Asia.

The question asks us to distinguish the form of Soviet involvement in Korea (pre-1950 and during the war) from Soviet involvement in Afghanistan (1979). This tests understanding of how Soviet support was strategic and conditional, varying by context.

In Korea, Stalin supplied Kim Il Sung with weapons, tanks and political approval before the 1950 invasion. Crucially, Soviet forces did not directly fight alongside North Korean forces — Moscow sought to avoid direct military confrontation with the United States, making Korea an example of indirect Soviet support.

In Afghanistan (1979), the USSR directly invaded and occupied the country, deploying roughly 100,000 troops to prop up a failing communist government. This represents the most direct and costly form of Soviet involvement in Asia — a qualitative difference from Korea's indirect, enabling support.

Option A correctly captures this distinction: weapons and political approval (indirect) in Korea versus direct military invasion (direct) in Afghanistan. This is the analytically precise contrast examiners reward in essays on the forms and limits of Soviet support.

The question asks for the accurate distinction between Soviet involvement in Korea versus Afghanistan. We need to check each option against the historical record of what the USSR actually did in each case.

Option B claims the USSR 'sent combat troops alongside North Korean forces' in Korea. This is factually incorrect — Soviet involvement in Korea was almost entirely indirect (weapons, advisers, approval). Soviet pilots did fly some missions covertly, but the USSR did not openly deploy combat ground forces in Korea.

Option C states that 'Stalin refused to provide any material support' in Korea. This directly contradicts the historical record — Stalin provided weapons, tanks and political authorization before the invasion, making material support a key enabling factor for the 1950 attack.

Option D claims the USSR and China 'cooperated to divide Afghanistan into separate occupation zones.' This is entirely fictitious — China and the Soviet Union were rivals by this period (Sino-Soviet split), and there was no joint Soviet-Chinese occupation arrangement in Afghanistan.

Option A is correct: in Korea, the USSR provided weapons and political approval while avoiding direct combat; in Afghanistan, Soviet forces directly invaded and occupied. This distinction — indirect support versus direct military intervention — is the key analytical contrast.