Question

What role did imperialism play in the shaping of american foreign policy in the late 19th and early 20th centuries?

Answer 1

 This topic involves the topic of American involvement in which America "conquered and annexed" various countries that were at times welcoming and others resented the involvement. It requires extensive research which is best conducted by you since you have the knowledge of the requirements. 
However, I have located a web site which I believe will help you immensely. 

The Age of Imperialism 

During the late nineteenth and early twentieth centuries, the United States pursued an aggressive policy of expansionism, extending its political and economic influence around the globe. That pivotal era in the history of our nation is the subject of this on-line history. 

Contents 
Expansion in the Pacific: 

A Letter to an Emperor 
Footholds in the Pacific 

The Spanish-American War: 

Remember the Maine 
A Splendid Little War 
A Gift from the Gods 

The Boxer Rebellion 
The Panama Canal 
U.S. Intervention in Latin America 

Lesson Plan 
Image Credits 
Bibliography 

gatita 

Degree in History (focus Jewish studies) and Spanish, New Mexico State U. 1990