Comprehensive Study Guide to World War II: Origins, Campaigns, and Key Figures

Pre-War Political Leadership and the Rise of Fascism

In the years leading up to the Second World War, the political landscape of Europe was shaped by significant leadership changes and the rise of totalitarian regimes. In Great Britain, the prominent figure serving as Prime Minister during the pre-war period was Chamberlain. His administration is historically noted for its specific approach to the aggressive territorial demands of the Third Reich. Simultaneously, in Nazi Germany, the transition of power was solidified when Hitler was appointed as Chancellor; at that time, the President of Germany was Hindenburg.

Inside the Nazi party, internal power dynamics were managed through specific leaders and organizations. The S.A. (Sturmabteilung) was under the leadership of Röhm. To maintain absolute control, the regime utilized various state structures, including the national army known as the Wehrmacht and the air force known as the Luftwaffe. The ideological expansionist goal of the German state was centered on the concept of Lebensraum, or "living space," which was used to justify the conquest of surrounding territories. In Italy, the fascist movement led by Mussolini gained momentum early on, marked by the significant March on Rome in the year $1922$. To consolidate power within Italy, the Vatican eventually recognized the Kingdom of Italy following the signing of the Lateran Pacts (Pactos de Letrán). Political dissent in Italy was suppressed by a specialized political police force known as the OVRA.

Diplomatic Policies and Pre-War Aggressions

The international response to German expansionism was characterized by a specific strategy known as the policy of pacification, or Appeasement (apaciguamiento), adopted by the major European powers. This policy reached a critical point in $1938$ during the Munich Conference (Conferencia de Múnich), where Great Britain and France ultimately yielded to the territorial demands of Hitler. One of the primary targets of this expansion was the Sudetes (Sudetenland), a German-speaking region that belonged to Czechoslovakia. Following the annexation of the Sudetes, the Germans established the Protectorado de Bohemia y Moravia (Protectorate of Bohemia and Moravia) within Czechoslovakian territory.

Aggression was not limited to Germany. In $1931$, Japanese forces invaded Manchuria, an action that led to the creation of the satellite state known as Manchukuo in $1932$. Italy also pursued imperialist goals, with Mussolini invading Ethiopia in $1935$. Within Europe, Hitler took several steps to dismantle post-WWI restrictions: in $1923$, a coup attempt by Hitler occurred in Munich (the Munich Putsch), and in the same year ($1923$), French forces invaded the Ruhr. In $1935$, the Third Reich enacted the deeply discriminatory Nuremberg Laws (Leyes de Núremberg) to target the Jewish population. By $1936$, Hitler successfully remilitarized the Rhineland (Renania). A major diplomatic turning point occurred when Germany and Italy solidified their partnership by signing the Pact of Steel (Pacto de Acero). This was further complicated by the signing of the Non-Aggression Treaty between Germany and the Soviet Union, known as the Ribbentrop-Molotov Pact (Pacto Ribbentrop-Mólotov), which took place just before the invasion of Poland.

The Outbreak of World War II and the Blitzkrieg

The formal start of the Second World War was marked by the German invasion of Poland. During this campaign, the German military employed a new and highly effective strategy termed Blitzkrieg, or "guerra relámpago." This method relied heavily on armored columns consisting of tanks known as Panzer. Following the conquest of Poland, German forces turned their attention toward Northern Europe, invading Denmark and Noruega (Norway) primarily to secure vital raw materials from Sweden. This period also saw the annexation of Austria into Germany, a process referred to as the Anschluss.

In Western Europe, the conflict intensified in $1940$ when British and French troops found themselves trapped and isolated at Dunkerque (Dunkirk). Following the fall of France, the country was divided, with the capital of the unoccupied zone established at Vichy. However, a significant internal resistance movement, known simply as the Resistencia (Resistance), emerged under the leadership of General De Gaulle. In the Balkans, Hitler followed the invasion of Greece by occupying Yugoslavia, further expanding Axis control over the continent.

Global Conflict and Turning Points in 1941

The year $1941$ is regarded as one of the most critical years of the war due to two major events: the invasion of the Soviet Union (URSS) and the Japanese attack on Pearl Harbor. The German invasion of the Soviet Union, known as Operation Barbarossa (Operación Barbarroja), saw German forces push deep into Soviet territory. A key strategic goal during this operation was to reach the southern city of Stalingrado (Stalingrad). On the Soviet side, following the German invasion of Poland, they occupied the Baltic states of Estonia, Letonia (Latvia), and Lituania (Lithuania). The Axis forces involved in these global efforts were primarily composed of three powers: Germany, Italy, and Japan.

In the Pacific theater, Japan's primary strategy was the establishment of a Great Asian Empire. However, the tide began to turn following significant Allied victories at the battles of Midway and Guadalcanal. Within the European and African theaters, systemic atrocities were committed, most notably the Holocaust, which refers to the systematic annihilation of the Jewish people conducted by the Nazi regime.

The African Campaign and the Decline of the Axis

The conflict in Africa was a vital front where the Germans aimed to capture the strategic Suez Canal. The German forces in this region were known as the Afrika Korps and were commanded by the renowned General Rommel. The presence of German troops in Africa ended definitively following their decisive defeat at the Battle of El Alamein, which forced their withdrawal from the continent.

On the Eastern Front, the Battle of Stalingrado proved to be a catastrophic failure for the Germans. Following this defeat, another massive engagement occurred on Soviet soil known as the Battle of Kursk. As the war reached its final stages, the momentum shifted entirely in favor of the Allied powers. In $1945$, the first military units to penetrate the city of Berlin were the Soviet troops. The final political framework for the post-war world was discussed at the Yalta Conference, where the "Big Three" leaders met: Roosevelt, Churchill, and Stalin.