Factors that led to War
Assassination
Alliances
U.S. involvment
200

European powers built up massive armies and navies, leading to an aggressive arms race

Militarism

200

This Archduke was assassinated, which led to the beginning of WWI

Franz Ferdinand 

200

The country that declared war on Serbia.

Austria-Hungary

200
The President that stated the United States would remain neutral in the war.

President Woodrow Wilson.

400

Formal defense agreements divided Europe into rival camps. The Triple Entente included France, Russia, and Great Britain. The Triple _____ included Germany, Austria-Hungary, and Italy

Alliances

400

The 19 year old assassin of Archduke Franz Ferdinand

Gavrilo Princip

400

This country that mobilized to protect Serbia 

Russia

400
This ship was sunk by a German U-boat, which served as a catalyst for US involvement in WWI.

Lusitania

600

Powerful nations competed fiercely for global colonies, trade markets, and wealth

Imperialism

600

Country blamed by Austria-Hungary for the assassination

Serbia

600

This country backed Austria-Hungary and declared war on Russia and France.

Germany

600

The Zimmerman Telegram was intercepted in this year.

1917

800

Intense national pride and desires for independence caused severe instability, particularly in the Balkan region

Nationalism

800

The city that the assassination took place in

Sarajevo, the capital of Bosnia and Herzegovina

800

This country entered the war after Germany marched through neutral Belgium to attack France.

Great Britain

800

This country sent the Zimmerman Telegram to Mexico.

Germany