A military action the added territory in the United States in 1848 was the Treaty of Guadalupe Hidalgo. It ended the Mexican-American war and added the territories California, Arizona, Colorado, New Mexico, Nevada, Utah, and Wyoming.
Answer:
#1 Charlemagne united most of Western Europe for the first time since the Roman Empire.
#2 Charlemagne was the first emperor of the Holy Roman Empire.
#3 Charlemagne played a vital role in the spread of Christianity across Europe.
Explanation:
