Nazi Foreign Policy: Expansionism to World War

Understanding Nazi foreign policy is crucial because it provides a clear blueprint for how a revisionist state, through a combination of ideological fanaticism, strategic opportunism, and diplomatic miscalculation by others, can dismantle a fragile international order and plunge the world into catastrophic war. It moves beyond a simple timeline of aggression to reveal the interplay between long-term ideological goals and short-term tactical maneuvers. This analysis traces the deliberate escalation from clandestine rearmament to open warfare, while engaging with the key historical debates that shape our interpretation of these events.

The Foundational Aims: Destroying Versailles and Pursuing Lebensraum

Adolf Hitler’s foreign policy was not an ad-hoc series of actions but was driven by core, interconnected aims laid out in Mein Kampf and his earlier writings. The first and most immediate objective was the complete destruction of the Treaty of Versailles. This 1919 treaty was hated in Germany; it imposed military restrictions, territorial losses, and the "war guilt" clause. For Hitler, dismantling Versailles was both a popular domestic policy and a necessary first step toward greater power. It meant overturning the military restrictions, remilitarising lost territories, and ultimately reversing the territorial settlements in the east.

The second, more radical aim was the conquest of Lebensraum (living space) in Eastern Europe. This was a racially driven ideology positing that the German Volk needed agricultural land for settlement, which would be taken primarily from the Slavic peoples, deemed racially inferior. This policy inherently required war and mass displacement. These two aims—the revision of Versailles and the pursuit of Lebensraum—provided a consistent direction. Early actions focused on the former, but they were always stepping stones toward the latter, culminating in a war of annihilation against Poland and the Soviet Union.

The Escalation of Aggression: From Rearmament to the Rhineland

The Nazi regime began its revisionism covertly and cautiously, testing the resolve of the League of Nations and the major Western democracies, Britain and France. Rearmament started in secret almost immediately after Hitler took power in 1933, but it was publicly announced in 1935 with the creation of the Luftwaffe (air force) and the introduction of conscription, blatantly violating Versailles. The muted international response, limited to formal protests, emboldened Hitler.

The first major military gamble came in March 1936 with the remilitarisation of the Rhineland. German troops marched into this demilitarised zone along Germany’s border with France, another direct violation of both Versailles and the Locarno Treaties. Hitler’s generals were apprehensive, as the German army was still weak and would have had to retreat if France had resisted. However, France, politically divided and reliant on British support, took no action. Britain, pursuing a policy of appeasement, saw the move as Germany merely "entering its own backyard." This critical success convinced Hitler of the weakness and reluctance of the democracies to enforce treaties by force, setting a pattern for future aggression.

Unification and Expansion: Anschluss and the Sudetenland Crisis

Having secured his western flank, Hitler turned to unifying all German-speaking peoples under the Reich, a powerful nationalist appeal. In March 1938, German forces orchestrated the Anschluss (union) with Austria. Despite being prohibited by Versailles, this merger was achieved through internal pressure by Austrian Nazis and the threat of invasion. Again, Britain and France did nothing, accepting the fait accompli. The annexation added Germany’s population and resources and positioned it for the next target: Czechoslovakia.

The Sudetenland crisis of summer 1938 was the zenith of appeasement. This region of Czechoslovakia was home to over three million ethnic Germans. Hitler demanded its cession, threatening war. Britain, led by Prime Minister Neville Chamberlain, was desperate to avoid another European conflict. The result was the Munich Agreement in September 1938, where Britain, France, and Italy agreed to force Czechoslovakia to surrender the Sudetenland to Germany. Chamberlain hailed it as securing "peace for our time." For Hitler, Munich was a dual victory: it achieved a major territorial gain without war and, more importantly, revealed the profound unwillingness of Britain and France to fight. It also eliminated Czechoslovakia’s defensive border, leaving it helpless for total dismemberment in March 1939.

The Road to War: The Invasion of Poland

The final, fatal step was the invasion of Poland in September 1939. After the occupation of the rest of Czechoslovakia in March—an act that was not about German minorities but pure territorial conquest—Britain and France finally guaranteed Polish independence. Hitler, however, did not believe they would fight. To avoid a two-front war, he secured the Nazi-Soviet Pact (Molotov-Ribbentrop Pact) in August 1939, a non-aggression treaty with Stalin that secretly divided Eastern Europe into spheres of influence. With the Soviet Union neutralised, Hitler felt free to attack. The staged Gleiwitz incident on 31 August provided a false pretext, and the invasion began on 1 September. Honouring their guarantee, Britain and France declared war on Germany on 3 September, beginning World War II in Europe.

The Historiographical Debate: Intentionalist vs. Structuralist Interpretations

Historians have long debated the driving forces behind Nazi foreign policy, primarily split between intentionalist and structuralist (sometimes called functionalist) interpretations. The intentionalist view, dominant in the early post-war period, posits that Hitler had a clear, step-by-step plan for expansion and war from the beginning, as outlined in Mein Kampf and the Hossbach Memorandum (1937). From this perspective, events from rearmament to the invasion of Poland were the deliberate execution of a preconceived "blueprint" for conquest.

The structuralist interpretation, which gained ground from the 1960s, argues that Nazi policy was more improvised and driven by internal pressures, economic needs, and the chaotic, polycratic nature of the Nazi state. In this view, Hitler was an "opportunist" who seized chances as they arose, such as the Austrian crisis, and was pushed forward by the dynamics of a regime that needed constant radicalisation and success. The debate is not entirely binary; most modern historians adopt a synthesis. They acknowledge Hitler’s fixed ideological goals (Lebensraum, racial war) but recognise that the timing and sequence of actions were shaped by circumstance, Western responses, and the internal momentum of the Nazi system.

Common Pitfalls

1. Viewing Appeasement as Pure Cowardice or Naivety: It is a mistake to dismiss Chamberlain and appeasement as simply foolish. In context, it was a policy driven by a profound horror of another world war, memories of the massive losses in World War I, economic constraints, a perceived lack of reliable allies, and a belief that some German grievances from Versailles were legitimate. The pitfall is failing to appreciate its complex motivations while correctly identifying its catastrophic consequence: convincing Hitler that aggression would not be met with determined resistance.
2. Seeing the Path to War as Inevitable: While Hitler’s long-term aims made major conflict likely, the specific timeline was not predetermined. The lack of forceful opposition at key junctures (the Rhineland, Munich) critically accelerated his aggression. A different, more robust Allied response at any of these points could have altered the course of events, though it might not have changed the ultimate goal of the Nazi regime.
3. Overlooking the Centrality of Ideology: A purely realist analysis that focuses only on power politics and ignores Nazi racial ideology is flawed. The pursuit of Lebensraum was not a traditional geopolitical goal but a genocidal programme. This ideology directly shaped the brutal, total nature of the war in the East, distinguishing it from earlier German war aims.
4. Treating Hitler as the Sole Driver: While Hitler’s role was decisive, the structuralist critique reminds us that he operated within a system. The Nazi state generated pressures for expansion, and the initiatives of subordinates, economic demands for resources, and the regime’s need for propagandistic successes all contributed to the aggressive momentum of foreign policy.

Summary

• Nazi foreign policy was guided by two core aims: the destruction of the post-World War I settlement (the Treaty of Versailles) and the acquisition of Lebensraum (living space) in Eastern Europe, a racially motivated goal requiring war.
• The policy escalated through calculated gambits—rearmament, remilitarising the Rhineland, the Anschluss with Austria, and the annexation of the Sudetenland—each met with inadequate resistance from Britain and France, whose policy of appeasement emboldened Hitler.
• The Munich Agreement (1938) was a pivotal moment, revealing the Western powers' desperate desire to avoid war and convincing Hitler they would not fight, leading directly to the invasion of Poland in 1939.
• Historians debate whether this path followed a clear intentionalist "master plan" or was a more structuralist, opportunistic process driven by internal Nazi dynamics and external circumstances; a synthesized view is now most common.
• The failure to contain Nazi expansion early, while understandable given the context of the 1930s, demonstrated the catastrophic risks of failing to confront a regime whose ideology fundamentally sought to overthrow the international order by force.