How did nationalism, new alliances, and growing tensions in Europe lead to World War I? Write your response in three to four complete sentences.

Alliances was the main reason

Explanation:

In the years leading up to the war, the nations of Europe were constantly jockeying for power and making alliances. Germany made an alliance with Austria-Hungary and Italy in 1881. These countries all agreed to protect each other in the event they were attacked by France. However, Italy then went and made a secret alliance with France saying they would not aide Germany.

It can cause intense competition among nations with each seeking to overpower the other.

Explanation:

The nationalism and patriotism of European nations, particularly the Great Powers, were significant factors in the road to World War I.

doctrine that the us had the right to expand throughout north america.