What Were the Neutral Countries in World War II?
When the global conflict erupted in 1939, many nations chose to stay out of the fighting, declaring themselves neutral in the hope of preserving sovereignty, avoiding devastation, or exploiting diplomatic take advantage of. Understanding which countries maintained neutrality, why they did so, and how their stance affected the war offers valuable insight into the complex geopolitics of the era. This article explores the definition of wartime neutrality, lists the nations that remained neutral throughout World II, examines their policies and challenges, and evaluates the consequences of their decisions.
Defining Neutrality in a World War
Neutrality during World II was not a uniform concept. In practice, neutrality ranged from strict non‑involvement to “armed neutrality,” where a country maintained a strong defensive posture while refusing to take sides. International law, primarily the Hague Conventions of 1899 and 1907, defined a neutral state as one that refrains from participating in hostilities, does not allow its territory to be used for military operations by belligerents, and treats all warring parties impartially. Some states adopted “benevolent neutrality,” offering economic aid or humanitarian assistance to one side while officially staying out of combat. Others were forced into neutrality by occupation, coercion, or the sheer impossibility of resisting the Axis or Allied powers.
European Neutrals
Europe hosted the largest cluster of neutral states, many of which clung to neutrality despite being surrounded by warring powers.
| Country | Declaration of Neutrality | Key Policies & Events |
|---|---|---|
| Sweden | 1939 (re‑affirmed throughout war) | Armed neutrality; allowed German troop transit through its territory in 1940‑1941 (controversial “transit treaty”), supplied iron ore to Germany, accepted refugees, and later aided Allied intelligence. Think about it: |
| Netherlands | 1939 (occupied May 1940) | Neutral until invasion; the Dutch East Indies continued to fight Japan, while the homeland was under German rule. |
| Spain | 1939 (after Civil War) | Official neutrality under Franco; sent the volunteer Blue Division to fight on the Eastern Front alongside Germany, traded with both sides, and allowed Axis naval use of its ports. Still, |
| Switzerland | 1939 (long‑standing tradition) | Armed neutrality; fortified borders (the “National Redoubt”), interned belligerent soldiers, served as a hub for diplomacy, espionage, and humanitarian work (Red Cross). |
| Luxembourg | 1939 (occupied May 1940) | Similar to Belgium; neutral until invasion, then placed under German civil administration. |
| Denmark | 1939 (occupied April 1940) | Initially neutral; after German invasion, the government collaborated while maintaining a façade of neutrality until 1943, then moved toward resistance. |
| Yugoslavia | 1939 (occupied April 1941) | Neutral until Axis invasion; partitioned and subjected to puppet regimes. |
| Greece | 1939 (occupied April 1941) | Neutral until Italian invasion, then German intervention; after occupation, a resistance movement emerged. Which means |
| Norway | 1939 (occupied April 1940) | Neutral until German invasion; thereafter governed by a German‑appointed regime, though the legitimate government-in-exile continued to claim neutrality abroad. In practice, |
| Turkey | 1939 (until 1945) | Neutral until February 1945 when it declared war on Germany (largely symbolic); sold chrome ore to both sides, hosted refugees, and acted as a diplomatic conduit. |
| Ireland | 1939 (Éire) | Neutrality enshrined in constitution; interned both Axis and Allied personnel, faced German espionage attempts, and secretly cooperated with British intelligence. Practically speaking, |
| Portugal | 1939 (long‑standing alliance with Britain) | Neutral but granted Britain access to Azores bases in 1943; exported tungsten to Germany until Allied pressure halted trade. Day to day, |
| Finland | 1939 (Winter War) | Fought the Soviet Union (1939‑1940) while seeking Western aid; later co‑belligerent with Germany (1941‑1944) against the USSR, then switched sides in 1944. |
| Belgium | 1939 (occupied May 1940) | Neutral until invasion; after occupation, the government fled to London, while the territory was administered by Germany. Though not neutral for the entire war, its early stance illustrates fluid neutrality. |
Key Takeaways:
- Armed neutrality (Sweden, Switzerland) relied on credible deterrence to dissuade invasion.
- Economic concessions (Sweden’s iron ore, Portugal’s tungsten, Turkey’s chrome) often blurred the line between neutrality and collaboration.
- Geographic positioning (Ireland’s Atlantic isolation, Switzerland’s alpine terrain) helped some states preserve neutrality longer than others.
Asian and Pacific Neutrals
In Asia, neutrality was rarer due to Japanese expansionism, but a few states managed to stay out of direct combat Simple, but easy to overlook..
| Country | Neutrality Stance | Notable Actions |
|---|---|---|
| Saudi Arabia | Neutral (declared 1939) | Maintained diplomatic relations with both Axis and Allies; supplied oil to Allies after 1942. Think about it: |
| Yemen (Mutawakkilite Kingdom) | Neutral | Limited foreign contact; remained largely isolated. |
| Afghanistan | Neutral (1939‑1945) | Pursued a policy of non‑alignment; received limited aid from both sides but avoided direct involvement. |
| Nepal | Neutral (though contributed troops) | Sent Gurkha regiments to fight with the British Indian Army; the state itself remained officially neutral. Which means |
| Bhutan | Neutral | Isolated monarchy; no significant wartime engagement. |
| Thailand | Initially neutral, then allied with Japan (1941‑1945) | Declared war on the Allies under Japanese pressure; not neutral for the whole conflict. |
| Iran | Neutral until 1941 | Occupied by Britain and the Soviet Union in August 1941 to secure supply lines; thereafter co‑operated with Allies. |
| Iraq | Neutral until 1941 | Pro‑Axis coup in 1941 led to British intervention; subsequently joined the Allied cause. In practice, |
| French Indochina (Vietnam, Laos, Cambodia) | Nominally neutral under Vichy France until Japanese occupation (1940‑1945) | Allowed Japanese troop movements; later resisted both French colonial rule and Japanese occupation. |
| Mongolia | Neutral (though Soviet‑aligned) | Officially neutral but hosted Soviet troops and provided logistical support against Japan. |
Observations:
- Many Asian states were drawn into the conflict because of strategic resources (oil in Saudi Arabia, rubber in Southeast Asia) or
