Why Is Switzerland Neutral? The 500-Year Story of Swiss Neutrality

Why is Switzerland neutral? Swiss neutrality began as a way to survive. After a brutal defeat at Marignano in 1515, the Swiss gave up on conquest. In 1815, Europe’s great powers then signed off on their “perpetual neutrality”. Since then, Switzerland has stayed out of every war. It has also argued, nonstop, about what neutral really means.

That argument is not history. It is fresh news. On 27 September 2026, Swiss voters threw out a plan to lock a strict form of neutrality into the constitution. Roughly seven in ten said no. Not one canton said yes.

So the Swiss love their neutrality. They just refuse to freeze it. To see why, we have to go back five hundred years, to a battlefield near Milan.

Swiss neutrality was born from a defeat, not a principle

Here's the part the postcards leave out. For most of the 1400s, the Swiss were not peaceful at all. In fact, they were the most feared foot soldiers in Europe. Swiss pike squares had crushed Habsburg knights. They had also wiped out the army of Charles the Bold of Burgundy. By 1512, they even ran the Duchy of Milan.

Then came 13 and 14 September 1515. At Marignano, the French king Francis I broke the Swiss army in two days of slaughter, with late help from Venice. The Swiss had marched south as a great power. They walked home as a league of tired mountain cantons.

As a result, they signed a "perpetual peace" with France in 1516 and dropped their dream of an empire. Still, they did not stop fighting. Swiss men kept dying in other people's wars for another 250 years. That grim trade is the subject of our history of the Swiss mercenaries.

The real engine: a country that could not agree

Honestly, Marignano only explains half of it. The other half is religion. After the Reformation, some cantons followed Zwingli and Calvin. Others stayed Catholic. They went to war with each other in 1529, 1531, 1656 and 1712.

Now imagine that shaky league picking a side in the Thirty Years' War. Catholic cantons would have backed the Habsburgs. Protestant ones would have backed Sweden. The country would simply have split. So staying out was the only policy every canton could live with.

That is my core argument here. Swiss neutrality started as glue at home, not as a moral stance. The noble language came much later.

1648 and 1815: when Europe put Swiss neutrality in writing

In 1648, the Peace of Westphalia ended the Thirty Years' War. Johann Rudolf Wettstein, the mayor of Basel, went to the peace talks. He came back with a prize: formal release from the Holy Roman Empire. For the first time, Switzerland stood on its own in law.

Being free, however, did not make it safe. In 1798, French armies invaded, looted the Bern treasury and swept away the old league. In its place came the Helvetic Republic, run from Paris in all but name. A year later, Russian and Austrian troops fought the French high in the Swiss Alps. Clearly, neutrality meant nothing when no one respected it.

The 1815 deal: Europe wanted a buffer

That lesson shaped the Congress of Vienna. After Napoleon fell, the great powers redrew the map of Europe. Then, on 20 November 1815, in Paris, they formally backed and guaranteed the "perpetual neutrality" of Switzerland.

Here's the awkward truth, though. This was not Europe rewarding Swiss virtue. Austria, Prussia, Russia and Britain wanted a neutral buffer to guard the Alpine passes between France and Austria. In other words, Swiss neutrality was as much Europe's idea as Switzerland's.

For that reason, I think 1815 matters more than Marignano. It turned a habit into law, and it made neutrality part of the European order. Later, the new federal state of 1848, born after the short Sonderbund War, took over that status. It then built a whole identity around it.

What Swiss neutrality actually means (and what it doesn't)

Most people picture Swiss neutrality as "Switzerland takes no sides on anything". That's wrong. And the gap between the myth and the rules explains almost every modern Swiss row.

The legal rules are short. They come from the Hague Convention V of 1907. In practice, a neutral state:

• does not take part in wars between other states;
• does not send troops or lend its land to a side at war;
• does not hand over weapons from its own army stocks;
• treats both sides the same if it limits private arms sales;
• defends its own borders, by force if needed.

That's it. Now notice what is missing. Nothing in that list bans economic sanctions, joining the UN or training with NATO. Those choices belong to neutrality policy, and the government can adjust them. The law stays fixed. The policy moves with the times.

Test yourself: neutral or not?

Before we go further, try the quiz below. Most readers get at least two answers wrong. That, honestly, is the point.

The world wars: the years Swiss neutrality nearly failed

On paper, neutrality looks calm. In reality, the two world wars pushed Switzerland to the edge, first from inside and then from outside.

During the First World War, the country split along its language line. German speakers tended to cheer for Germany, while French speakers backed France. That rift, which we explore in our piece on the Röstigraben, never fully closed.

Then, in June 1917, came a scandal. A Swiss minister, Arthur Hoffmann, tried to help broker a separate peace between Germany and Russia. Since that deal would have freed German troops for the Western Front, the Allies were furious. Hoffmann quit. To calm them down, parliament chose Gustave Ador, the head of the Red Cross, to replace him.

1940: the summer Swiss pilots shot down the Luftwaffe

This is the story I find most surprising. In May and June 1940, German planes kept crossing into Swiss skies during the attack on France. Swiss fighter pilots went up to meet them. They shot down eleven German aircraft and lost three of their own.

The twist? Many Swiss pilots flew Messerschmitt Bf 109s, bought from Germany just before the war.

Hitler was livid. According to Swiss accounts, Germany sent saboteurs to wreck Swiss airfields, but Swiss troops caught them first. Even so, on 20 June 1940, the Swiss government told its pilots to stop chasing foreign planes. Neutrality, it turned out, also meant knowing when to back down.

A month later, General Henri Guisan gathered his officers on the Rütli meadow. There, he set out the Réduit plan: pull back into the Alps and make any invasion hideously costly. Hence the fortress lines, the fake chalets that hide cannons and the bridges rigged with explosives.

Neutral, but not clean

Quick caveat, because this part matters. Switzerland stayed out of the war. Yet it did not stay out of the war economy. The Swiss National Bank bought gold from Nazi Germany, and Swiss officials turned away many Jewish refugees at the border. We cover that record in detail in Switzerland and Nazi gold.

Meanwhile, neutrality did not protect everyone. On 1 April 1944, American bombers mistook Schaffhausen for a German town and killed 40 people. Washington later paid millions of francs for the damage. So yes, Swiss neutrality kept the country out of the fighting. It did not keep the fighting out of the country.

The Cold War: armed neutrality, bunkers and a secret

After 1945, Swiss neutrality became something new: a national brand. Switzerland stayed out of NATO and, oddly, out of the United Nations too. In 1986, voters said no to UN membership by 75.7%. Every canton said no.

Neutral did not mean unarmed. Quite the opposite. Every man served in the militia, many kept a rifle at home, and a 1963 law led to the famous nuclear bunker in every Swiss home. The militia still trains hard today, though not always with perfect map-reading: since 1968, Swiss units have strayed into Liechtenstein by mistake five times.

The brand hid a secret

Now for the messy part. While Switzerland sold itself as the honest broker, a firm in Zug sold rigged code machines to about 120 governments. The CIA, together with West German spies until 1993, secretly owned it. Our deep dive on Crypto AG and the CIA shows how Swiss neutrality became cover for one side of the Cold War.

I don't think that cancels the good work Swiss diplomats did. It does show that neutrality always mixed good faith with self-interest.

The good-offices business

Neutrality also created a real diplomatic trade. As a "protecting power", Switzerland stands in for countries that have cut ties with each other. During the Second World War, it held 219 such mandates for 35 states. Since 1980, it has looked after US interests in Iran. In early 2026, it still held eight mandates.

Add Geneva to that picture. The city hosts the Red Cross, the UN's European base and hundreds of global bodies. In 2002, the Swiss finally joined the United Nations with 54.6% of the vote. To this day, they are the only country that joined the UN by popular vote.

2022: the year Switzerland rewrote its own rulebook

Then Russia invaded Ukraine, and every old compromise came under pressure at once.

On 28 February 2022, the Swiss government adopted the European Union's sanctions against Russia. For a country that once hid behind neutrality on almost everything, this felt like an earthquake. Moscow hit back by putting Switzerland on its list of "unfriendly" states. Later that year, it refused to let Switzerland act as a protecting power for Ukraine. The reason it gave? The Swiss, it said, were no longer neutral.

The weapons problem

At the same time, the Swiss angered their Western friends. Swiss law stopped other countries from passing Swiss-made arms to Ukraine. So Bern refused Germany's request to send Swiss ammunition for its Gepard anti-aircraft guns. It also said no to similar requests from Denmark and Spain.

Critics called that "neutrality as an excuse". Swiss arms makers warned that foreign buyers were walking away. In response, parliament eased the War Material Act in December 2025. Now, certain partner countries may pass on Swiss weapons under strict terms. However, opponents forced a referendum, and voters will decide on 29 November 2026.

Switzerland also tried to use its good offices. In June 2024, it hosted a summit on peace in Ukraine at the Bürgenstock resort above Lake Lucerne. It was a classic Swiss move: offer the table, not the tanks.

The 2026 vote: what Swiss voters actually decided

This brings us back to 27 September 2026. The neutrality initiative came from the group Pro Schweiz, with backing from the Swiss People's Party. It wanted three things written into the constitution:

• "perpetual and armed" neutrality;
• no sanctions unless the UN Security Council approves them;
• no military alliances, except if Switzerland itself comes under attack.

The result was blunt. About 70% voted no, and every canton turned it down. Turnout sat around 47%.

Why a nation of neutrality fans voted no

At first glance, that looks like a contradiction. It isn't, quite. Polls have long shown that a vast majority of the Swiss back neutrality. What they rejected was a straitjacket. After all, a UN veto on sanctions would hand Russia or China a say over Swiss foreign policy.

In my view, the vote confirmed what the history above already shows. Swiss neutrality survives because it bends. It bent after Marignano, after 1815, after 1945, in 2002 and again in 2022. Freezing it would have been the least Swiss thing of all.

Five centuries of bends, in 13 moments

Click through each turning point below. Notice how often the Swiss changed course, and how rarely they admitted it at the time.

Not a step towards NATO

Still, don't read the vote as a step towards NATO. Joining any military alliance would need a mandatory national vote, and there's no sign of a majority for that. The Swiss want neutral and flexible, not neutral and alone.

Is Switzerland still neutral? My honest verdict

Yes, legally. Switzerland belongs to no military alliance. It sends no troops to wars and gives no weapons from its own stocks to warring states. It works with NATO through the Partnership for Peace, which it joined in 1996. Even so, no one has promised to defend it.

Politically, the answer is more nuanced. On sanctions, Switzerland now stands with the West. On weapons, it still refuses to pick a side, at least until the November vote. That mix annoys Kyiv, Moscow and Brussels at the same time. Which, admittedly, is a very Swiss outcome.

How Swiss neutrality compares with Europe's other neutrals

Compare it with the other neutral countries below, and one thing stands out. Switzerland is the only one that pairs armed neutrality with staying out of the EU, and with a public that votes on the question directly.

Swiss neutrality also explains why the country keeps Brussels at arm's length. For the full story of that relationship, read our guide to whether Switzerland is in the EU. And if you wonder how 70% of voters could overrule a whole party on foreign policy, our explainer on Swiss direct democracy shows how the system works.

To see where neutrality sits among 700 years of events, browse our interactive Swiss history timeline. You'll spot the same pattern again and again: pressure, compromise, survival.

Frequently asked questions about Swiss neutrality