84
Lesson 84 of 84 · Colonization
The Columbian Exchange: Foods, Animals, and Diseases
World War I (1914–1918) was one of the deadliest conflicts of its time. New weapons — machine guns, tanks, and poison gas — caused devastating casualties across Europe.
Key Facts
1
Oral histories preserve community stories.
2
Primary sources come from the time of the event.
3
Historians use evidence to support claims.
Check Your Understanding
Question 1
1 of 2What is an artifact?