Improved foreign relations
Increased U.S. immigration
Exploration of unknown lands
New markets for U.S. goods
Hawaii was ceded by Spain.
Hawaii was purchased from Japan.
The Hawaiian people chose to be part of the United States.
The United States annexed Hawaii.
It was rich in natural resources.
It provided access to Chinese markets.
The Filipinos wanted to become U.S. citizens.
The Filipinos and Americans had similar cultures.
Puerto Rico won its independence.
The United States acquired Alaska.
Panama broke away from Columbia.
The United States annexed the Philippines.
U.S. shipping lines
West Indian canal workers
The League of Nations is formed.
The Treaty of Versailles is signed.
The United States declares war against Germany.
The Central Powers declare war against the United States.
Germany quickly surrendered.
German men enlisted in record numbers.
U.S. soldiers and equipment weakened the Germans.
Untrained U.S. forces and poor strategies lengthened the fighting.