World War I

Industrial Revolution

A period of major industrialization that transformed economies and societies, facilitating advanced technology and increasing production capabilities.

Franco-Prussian War

The conflict between France and Prussia (1870-1871), which resulted in a shift of power in Europe and the unification of Germany, generating tensions.

Nationalism

A political ideology that emphasizes the interests and culture of a particular nation, often leading to desire for independence or dominance.

Militarism

The belief in building up strong armed forces to prepare for war, leading to an arms race among European nations.

Complicated Alliances

The network of treaties and agreements among European countries that created commitments to support one another during conflict, significantly influencing the outbreak of WWI.

The Black Hand

A secret nationalist organization involved in the assassination of Archduke Franz Ferdinand, which contributed to the outbreak of WWI.

The July Crisis

The series of diplomatic and military escalations in July 1914 following the assassination of Archduke Franz Ferdinand, which ultimately led to the start of WWI.

Schlieffen Plan

Germany's military strategy during WWI designed to quickly defeat France before turning to fight Russia, which influenced the early battles of the war.

Unrestricted Submarine Warfare

A naval warfare strategy employed by Germany during WWI that targeted all ships, including civilian vessels, leading to heightened tensions with neutral countries.

Zimmerman Telegram

A secret communication from Germany to Mexico proposing a military alliance against the United States, which contributed to U.S. entry into WWI.

Treaty of Brest-Litovsk

The peace treaty signed in March 1918 between the Central Powers and Soviet Russia, which had significant implications for the Eastern Front dynamics.

May 7, 1915, by a German U-boat during World War I, leading to significant loss of civilian lives and contributing to the U.S. entering the war.

When the Lusitania was sunk

When did the United States declare war on Germany?

The United States declared war on Germany on April 6, 1917, entering World War I.