Those being

• Imperialism

• Militarism

• Alliances

1. The first main cause of WWI was related to imperialism.

Imperial competition among European powers for colonies and resources around the world heightened tensions. Countries sought to expand their territories and influence, leading to conflicts

2. The second main cause of WWI was militarism.

A fierce arms race among European powers, leading to the rapid expansion of armies and development of advanced weaponry. Increased military build-up, with countries stockpiling weapons and ammunition, creating a sense of competition and paranoia.

3. The third main cause of WWI was an alliance system.

A system of alliances had developed in Europe prior to World War I, where countries were drawn into conflicts based on treaties that obligated them to support their allies. When one country was pulled into a conflict, its allies were automatically involved, escalating tensions and leading to a domino effect of declarations of war.

I'll list them as

• The assassination of Archduke Franz Ferdinand

• The Battle of Somme

• The Treaty of Versailles

1. On June 28, 1914, Archduke Franz Ferdinand of Austria-Hungary was assassinated in Sarajevo by Gavrilo Princip, a Bosnian Serb nationalist. This was what primarily quick-started the war.

2. Fought from July 1 to November 18, 1916, the Battle of the Somme was one of the bloodiest battles in World War I. It took place near the Somme River in France between the British and French forces against the German Empire.

3. Signed on June 28, 1919, the Treaty of Versailles officially ended World War I. The treaty imposed harsh penalties on Germany, including territorial losses, disarmament, and reparations payments

• Nazi Germany

• Soviet Union

• Fascist Italy

1. Under the leadership of Adolf Hitler, the Nazi regime in Germany emphasized extreme nationalism, racism, and anti-Semitism, leading to the Holocaust and WWII. Driven by racial targeting, the Nazi Party systematically wiped out 6 million Jewish people. and implemented discriminatory laws targeting Jews.

2. Under Joseph Stalin rule, Stalin's regime in the Soviet Union implemented a centrally planned economy, political repression, and forced collectivization of agriculture. Stalin also conducted purges on activists and those who were deemed political opponents.

3. Under Benito Mussolini, Mussolini's fascist regime in Italy promoted authoritarianism, nationalism, and militarism, establishing a one-party state and suppressing political opposition. Mussolini implemented strict censorship and propaganda to control public opinion.

• The invasion of Normandy, France

• Battle of Stalingrad

• Atomic bombings of Hiroshima and Nagasaki

1. On June 6, 1944, The allied forces launched a massive invasion on the beaches of Normandy, France, known as D-Day. This operation marked the beginning of the liberation of Western Europe from Nazi control, which in the end defeated Germany.

2. Fought from August 1942 to February 1943, the Soviet Union successfully defended the city of Stalingrad from German forces in a brutal and decisive battle that resulted in heavy casualties on both sides. The German defeat at Stalingrad marked a significant setback for Hitler's ambitions in the Soviet Union.

3. In August 1945, the United States dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki. The bombings resulted in massive destruction, and radiation effects, leading to Japan's surrender and directly lead to the end of WWII.

Except the outcomes of WW1 lead to the reasons for WW2.

Listed as

• The Treaty of Versailles

• The Failure of Appeasement

• Expansionist Agendas

1. The treated of Versilles ended the war, but enforced harsh treatment upon Germany. This created resentment and economic instability in Germany, laying the groundwork for the rise of Adolf Hitler and Nazi aggression.

2. The policy of appeasement by Western powers towards aggressive actions by dictators like Hitler and Mussolini allowed them to expand their territories unchecked, emboldening their ambitions and eventually leading to the outbreak of war.

3. The aggressive expansionist policies pursued by totalitarian regimes, such as Nazi Germany's territorial ambitions in Europe, Japan's militarism in Asia, and Italy's conquests in Africa, directly contributed to escalating tensions and conflicts that showed up in World War II