What most helped to fuel the growth of American imperialism between the Civil War and World War l

American imperialism consists of policies aimed at extending the political, economic, and cultural influence of the United States over areas beyond its boundaries. Depending on the commentator, it may include military conquest, gunboat diplomacy, unequal treaties, subsidization of preferred factions, economic penetration through private companies followed by intervention when those interests are threatened, or regime

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.