11.1 Road to War

From Peace to Growing Tensions

At the end of World War I, many people hoped that such a large and destructive conflict would never happen again. The Treaty of Versailles, signed in 1919, was meant to secure peace and punish Germany. In practice, it left deep anger, economic problems, and political instability in several countries. Germany lost territory, colonies, and was forced to pay large reparations. Many Germans saw the treaty as humiliating and unfair. This sense of humiliation became one of the emotional foundations on which extremist political movements later built their support.

The new international system tried to prevent future wars through the League of Nations, an organization meant to settle disputes peacefully. However, the League had no real military power, and important countries, such as the United States, never joined. As a result, the international order that followed World War I appeared fragile. At the same time, many empires had collapsed, including the Austro Hungarian and Ottoman Empires. New states appeared across Europe and the Middle East, often with disputed borders and ethnic tensions. These unsettled questions created potential flashpoints for future conflict.

Economic Crisis and Political Extremism

The global economy in the 1920s and 1930s played a vital role in the road to World War II. The world experienced brief recovery after World War I, but this was fragile. In 1929 the Wall Street Crash in the United States triggered the Great Depression. International trade collapsed, banks failed, and unemployment soared in many countries. Millions of people lost their jobs and savings. In this climate of fear and frustration, extremist leaders who promised quick solutions became more attractive.

Germany suffered especially badly. Already burdened by reparations and high inflation in the early 1920s, it now faced mass unemployment. Many Germans began to doubt democracy and the Weimar Republic, the democratic government created after World War I. Adolf Hitler and the Nazi Party exploited this situation. They blamed the Treaty of Versailles, minorities, and communists for Germany’s problems and promised to restore national strength and pride.

Italy also felt dissatisfied. Although it fought on the winning side in World War I, many Italians believed they had not received enough territory as a reward. Benito Mussolini and his Fascist Party came to power in the early 1920s, presenting themselves as a strong alternative to unstable parliamentary politics. Economic difficulties helped Mussolini justify tighter control and aggressive foreign policy.

Japan, a rising power, suffered from the global slump as well. Its leaders believed that control of territories rich in raw materials, especially in East Asia, would solve its economic problems. This belief encouraged expansionist policies and militarism. In several countries democratic systems appeared weak or incapable of responding to the crisis. As a result, dictatorships that used nationalism, propaganda, and promises of revival gained ground.

The Rise of Aggressive Regimes

By the early 1930s three key powers had governments that rejected many of the principles of the post World War I order. Nazi Germany under Hitler, Fascist Italy under Mussolini, and militarist Japan all believed in expansion, military strength, and authoritarian rule. They rejected liberal democracy and international cooperation.

In Germany, Hitler became chancellor in 1933 and then quickly dismantled democratic institutions. The Nazi regime combined racism, antisemitism, and a desire to overturn the Treaty of Versailles. Rearmament, or building up the military, became central to Nazi policy. This broke the treaty’s rules, but Germany justified it as necessary for security and national pride.

In Italy, Mussolini aimed to recreate a modern version of the Roman Empire. He spoke about Italy’s need for more territory to support its population, especially in Africa. Propaganda celebrated violence and war as expressions of national strength.

In Japan, military officers and nationalist politicians gained increasing influence. They argued that Japan needed an empire to secure resources like coal, iron, and oil. Civilian politicians lost power, and military leaders pushed a more aggressive foreign policy in Asia.

These three powers shared a sense of grievance and the belief that war or the threat of war was a legitimate tool of policy. They also watched how the other major powers, like Britain, France, and the United States, responded to early acts of aggression and took note when those responses seemed weak.

First Acts of Aggression and Weak Responses

The road to a wider war began with a series of regional crises in the 1930s. Each time, an aggressive move went largely unpunished, which encouraged further steps.

Japan acted first. In 1931 Japanese forces staged an incident on a railway in Manchuria, a region in northeastern China, and used it as a pretext to invade. Japan quickly took control and created a puppet state called Manchukuo. The League of Nations condemned the invasion, but it could not compel Japan to withdraw. Japan simply left the League. This showed that a determined power could defy the international system without facing serious consequences.

Italy followed with its own act of expansion. In 1935 Mussolini ordered the invasion of Ethiopia, one of the few independent African states. Italian forces used modern weapons and even chemical gas against Ethiopian soldiers and civilians. The League of Nations imposed limited economic sanctions, but key materials such as oil were not embargoed. Britain and France feared that pressing Italy too hard would drive it toward alliance with Germany, so they did not act decisively. Italy succeeded in conquering Ethiopia, and this undermined confidence in collective security.

These events revealed a pattern. Aggressive states tested the limits, and the international community responded slowly and weakly. The failure to stop earlier acts of aggression sent a signal to other leaders that they could pursue expansion with relatively low risk. This background is essential to understand what happened when Germany began to challenge the postwar settlement more directly.

Hitler’s Early Moves and the Policy of Appeasement

From 1933 onward, Nazi Germany worked systematically to break free from the restrictions of Versailles. In 1935 Hitler publicly announced the existence of a German air force and introduced conscription to enlarge the army, both forbidden by the treaty. Britain and France protested, but they did not take military action. Many in Britain believed that some of the treaty’s terms had been too harsh, so they accepted limited German rearmament as understandable.

The key turning point came with the remilitarization of the Rhineland in 1936. The Rhineland was a region of western Germany next to France and Belgium that, under the treaty, had to remain demilitarized. German troops entered the area, a direct violation of the treaty and later agreements. The German army was still relatively weak, and Hitler had given orders to retreat if the French resisted. However, France did not act without British support, and Britain favored caution. The move succeeded, which increased Hitler’s confidence at home and abroad.

During this period, Britain and France followed a policy usually described as appeasement. Appeasement involved making concessions to Germany, such as allowing treaty violations, in the hope that meeting some of its demands would satisfy it and preserve peace. Leaders like British Prime Minister Neville Chamberlain believed that understanding German grievances and negotiating could avoid another catastrophic war. Their populations, still traumatized by World War I, largely supported efforts to maintain peace.

At the same time, Germany and Italy drew closer. They supported General Francisco Franco in the Spanish Civil War, which began in 1936. This conflict became a testing ground for new weapons and tactics, including aerial bombing of cities such as Guernica. The Spanish Civil War also deepened ideological divisions in Europe between fascism and its opponents. The Rome Berlin Axis, an understanding between Italy and Germany, formed in this context, signaling that the two regimes now saw their interests as aligned.

The Breakdown of the Versailles Order in Central Europe

The next stage in the road to war involved the transformation of the political map of central Europe. Austria and Czechoslovakia became central targets of German expansion, both for strategic reasons and because Nazi ideology claimed that German speaking populations should be united under one Reich.

In March 1938 German troops crossed into Austria in an event known as the Anschluss. Many Austrians welcomed union with Germany, and there was no military resistance. The union violated the treaties that followed World War I, which had guaranteed Austrian independence. Once again, Britain and France chose not to intervene. They saw the Anschluss as a case of self determination for German speakers rather than an act worth going to war over.

Czechoslovakia presented a more complex case. It was a multi ethnic state created after World War I, and it contained a significant German speaking population in the Sudetenland, a border region with Germany. Hitler claimed that these Germans were oppressed and demanded that the Sudetenland be given to Germany. Czechoslovakia had alliances with France and the Soviet Union, and it possessed strong fortifications, so a crisis here risked a larger war.

In September 1938 leaders of Germany, Italy, Britain, and France met in Munich to resolve the Sudetenland issue. Czechoslovakia was not invited to the main discussions. The result was the Munich Agreement. Britain and France agreed to allow Germany to annex the Sudetenland in exchange for Hitler’s promise that he had no further territorial demands in Europe. Chamberlain returned to Britain claiming that the agreement meant “peace for our time.”

The Munich Agreement became the most famous example of appeasement. Many people in Britain and France welcomed it as a way to avoid war. Others, including some politicians like Winston Churchill, argued that sacrificing Czechoslovakia’s defenses would only strengthen Germany and make a future war more likely. Within months, their warnings appeared justified. In March 1939 German troops occupied the rest of Czech lands and created a puppet state in Slovakia. This move went far beyond uniting German speakers and revealed Hitler’s broader expansionist ambitions.

From Regional Crises to the Polish Question

The occupation of the rest of Czechoslovakia in 1939 marked a clear turning point. Britain and France now understood that Hitler’s goals were not limited to revising the Versailles Treaty but involved larger territorial conquest. They responded by giving guarantees to Poland. These guarantees promised that Britain and France would come to Poland’s aid if its independence was threatened.

Poland, positioned between Germany and the Soviet Union, was strategically important. The city of Danzig, with a largely German population, and the Polish Corridor, which separated East Prussia from the rest of Germany, were particular sources of tension. Hitler demanded changes to Poland’s borders and transport rights. The Polish government, aware of what had happened to Czechoslovakia, refused to submit to these demands.

While Germany prepared for possible conflict with Poland, it faced a potential problem. A war with Poland could bring France and Britain into the conflict, and Germany still lacked secure access to vital resources, especially oil and grain, in case of a long war. Facing this situation, Hitler sought an agreement with a surprising partner, the Soviet Union, led by Joseph Stalin.

The Nazi–Soviet Pact and Final Steps to War

In August 1939 Germany and the Soviet Union signed the Molotov Ribbentrop Pact, often called the Nazi Soviet Pact, named after their foreign ministers. On the surface it was a non aggression treaty. Each side promised not to attack the other. This shocked many observers, because Nazi and Soviet ideologies were bitterly opposed. However, both leaders saw short term advantages.

Germany secured its eastern front. This meant that if it attacked Poland, it would likely avoid a simultaneous war with the Soviet Union. The Soviet Union gained time to rearm and prepare, after recent purges had weakened its army leadership. There was also a secret part of the pact, a protocol where Germany and the Soviet Union agreed to divide spheres of influence in Eastern Europe. According to this secret understanding, Poland would be partitioned between them, and the Baltic states and parts of Romania would fall under Soviet influence.

The signing of the Nazi Soviet Pact removed a major obstacle to German aggression against Poland. Diplomatic efforts to prevent war continued, but they became increasingly desperate. Britain and France confirmed their commitments to Poland, yet they did not have a practical way to send large armies there quickly once hostilities started.

By late August 1939 European governments were preparing for the worst. Civilians in Britain and other countries practiced air raid drills, and plans were made for evacuation of children from major cities. However, many people still hoped that a solution could be found at the last moment, as at Munich. The memory of the previous war and its horrors weighed heavily on decision makers and ordinary citizens alike, creating deep tension between the desire to resist aggression and the fear of another massive conflict.

On 1 September 1939, German forces invaded Poland from the west, north, and south. They used a combination of fast moving tanks and aircraft in what later became known as blitzkrieg, or lightning war. This attack was the immediate trigger of World War II, but it was the result of a long sequence of events. The weaknesses of the post World War I settlement, the global economic crisis, the rise of aggressive regimes, misjudgments and divisions among the democratic powers, and a series of unpunished acts of expansion all contributed to a situation in which large scale war became increasingly likely.

In response to the invasion of Poland, Britain and France delivered ultimatums to Germany and, when these were ignored, declared war in early September 1939. At that point the period known as the road to war ended, and the global conflict of World War II had begun.