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World War II Overview: Causes, Key Leaders, Battles, and Global Impact Essay

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Introduction

World War II was one of the most destructive conflicts in human history. The major conflicts of World War II arose from numerous issues, including territorial and political disputes. For example, Germany sought to restore its greatness and power after its defeat in World War I and demanded increased territory. Another conflict was the dispute between Japan and the U.S. over control of the Pacific region.

Leaders and Powers in the Conflict

The major powers during the conflict were Germany, Japan, and Italy, forming the Axis. The Allies opposed them, comprising the USSR, the U.S., and the U.K. Important leaders included Adolf Hitler, Benito Mussolini, Emperor Hirohito, and Joseph Stalin. The leaders of the Allies included Winston Churchill, Franklin D. Roosevelt, and Joseph Stalin.

The war progressed through several stages, encompassing battles in Europe, North Africa, the Pacific region, and Asia. One of the most significant battles was the Battle of Stalingrad, which led to the first major defeat of German forces (Bartrop 112). Another critical battle was the Battle of Midway, where the Japanese Imperial Army suffered significant losses.

States and leaders who contributed to resolving conflicts included the Allies and the Axis. On the Allied side, Joseph Stalin, Winston Churchill, and Franklin Roosevelt played a decisive role in the Allies’ victory in World War II. They were actively involved in strategic decisions that helped lead to the defeat of Germany and Japan (Erdogan 67). One of the critical events that contributed to resolving the conflict was the Allied landing in Normandy in 1944. This operation gave the Allies control over Europe and was one of the critical moments in the Allies’ victory in World War II.

However, it is worth noting that on the Axis side, some leaders and states attempted to halt the war. For example, Japanese Emperor Hirohito decided to surrender after the atomic bombing of Hiroshima and Nagasaki. Also, Nazi General Claus von Stauffenberg attempted to assassinate Hitler in 1944 to prevent the continuation of the war.

After World War II, leaders and nations took measures to restore peace and stability. One such measure was the creation of the United Nations (U.N.), which was established in 1945 to prevent future conflicts and promote international cooperation. Additionally, international organizations such as the European Union were created to ensure peace and stability in Europe (Mawdsley 106).

Key leaders and nations during World War II included Germany, Japan, and Italy, which formed the Axis powers, and the United States, Great Britain, and the Soviet Union, which formed the Allies. Germany’s prominent leader was Adolf Hitler, who sought domination in Europe and the expansion of his country’s territory. Japan’s prominent leader was Emperor Hirohito, who sought to expand Japan’s territory in Asia. Italy’s prominent leader was Benito Mussolini, who sought to create a new Roman Empire.

In the Allies, the prominent leader was U.S. President Franklin D. Roosevelt, who died during the war and was succeeded by his vice president, Harry Truman. Great Britain was represented by Prime Minister Winston Churchill, who advocated for his country to remain a superpower. In the Soviet Union, Joseph Stalin was the prominent leader, who sought to protect his country’s interests and strengthen its position in world politics (Mawdsley 105).

Primary Causes

One of the main problems that led to World War II was nationalist and racial ideologies that elevated some nations to a position of superiority over others and insisted on their dominance. This became the cause of aggressive foreign policy actions such as the annexation of Austria, the annexation of Czechoslovakia, and the invasion of Poland by Germany.

Another significant cause of World War II was the substantial economic inequality between nations, as well as the desire for control over resources and territories. This led to competition for control of colonies and markets, which in turn became a cause of aggressive actions by nations. Additionally, following World War I, the League of Nations was established, with the intention of maintaining peace and preventing future wars. However, many nations did not join the League of Nations, and those that did were unable to prevent the outbreak of World War II. The League of Nations became ineffective due to its weak enforcement mechanisms and the strong nations that were capable of pursuing joint policies.

Key Outcomes

One of the main legacies of the war is the global distribution of power. At the war’s end, the United States and the Soviet Union became the primary superpowers, engaging in a global confrontation with each other. This confrontation lasted for decades and led to numerous problems and conflicts in different parts of the world. Even after the end of the Cold War, a global power imbalance continues to influence world politics today.

However, in 1991, the USSR dissolved, marking the end of the Cold War (Mawdsley 93). The United States has become the sole superpower in the world, and in this capacity, it continues to play a crucial role in global politics to this day. One of the crucial leaders who contributed to the end of the conflict was U.S. President Harry Truman. In August 1945, the United States dropped atomic bombs on Hiroshima and Nagasaki, which were decisive in Japan’s surrender. As a result, Japan surrendered, and World War II came to an end.

Major Events

One of the critical events during the war was the United States’ involvement in the war after the Japanese attack on Pearl Harbor in 1941. Following this, the United States joined the war on the Allies’ side and played a decisive role in the fight against the Axis powers. A critical moment during the war was also the Battle of Stalingrad, in which Soviet troops achieved a decisive victory over the German army (Jordan 103).

It is essential to recognize that World War II had a profound impact on world history. The consequences and events that led to its beginning continue to influence world politics and culture today. The war also emphasized the importance of cooperation and peaceful conflict resolution, demonstrating the cruel consequences that can result when these principles are violated.

Thus, World War II was one of the most destructive and significant conflicts in history. Its beginning was caused by many issues, including political and territorial disputes, and heavy losses and profound changes in world politics marked its end (Jordan 96). However, thanks to the efforts of many leaders and states, measures were taken to restore peace and stability, which continues to influence global politics and culture today.

Conclusion

In conclusion, World War II was one of the most devastating conflicts in human history. Many issues, including territorial and political disputes, caused its beginning. Influential leaders during the conflict included Hitler, Mussolini, Emperor Hirohito, Churchill, Franklin D. Roosevelt, and Stalin. After World War II, leaders and states took measures to restore peace and stability, including the creation of the United Nations and other international organizations. Despite the enormous sacrifices made during the war, it also led to significant changes in world politics, including the strengthening of the United States as a global power, the creation of the European Union, and the border adjustments of many countries.

Works Cited

Bartrop, Paul. The Routledge History of the Second World War. Taylor & Francis, 2021.

Erdogan, A. History of World War II 1939-1945: The Struggle of Progressive Forces for the Preservation of Peace. Lulu, 2022.

Jordan, David. The History of World War II: The Defining Conflict of the Twentieth Century Day by Day. Amber Books, 2021.

Mawdsley, Evan. World War II: A New History. Cambridge University Press, 2020.

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IvyPanda. 2026. "World War II Overview: Causes, Key Leaders, Battles, and Global Impact." January 8, 2026. https://ivypanda.com/essays/world-war-ii-overview-causes-key-leaders-battles-and-global-impact/.

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