Making an army to prepare an/or use for warfare.

Countries that work together

Taking over other countries

Having a ton of pride in your country, believing it's the best

The archduke assassination triggered World War 1

World War 1 opened up lots of new doors for technology

Trench Warfare was a big strategy during WW1 that didn't really work that well

When the United States entered WW1 it resulted in the Allies winning

The League of Nations was formed to help prevent another World War

The Treaty of Versaille was made to make peace between countries and punish Germany