Which of the following factors has most significantly influenced global perceptions of the USA in the 21st century?

The U.S. policy of preemptive action to combat terrorism, particularly after 9/11, is encapsulated in which doctrine?

The strategic initiative to counter Soviet geopolitical expansion during the Cold War was known as:

The principal goal of the United Nations, founded in 1945 with strong U.S. support, is to:

Which battle is considered a turning point for the Allies in the Pacific during World War II?

The Sherman Antitrust Act of 1890 was enacted to:

The Emancipation Proclamation, issued during the Civil War, primarily aimed to:

Which of the following principles is NOT a feature of the U.S. Constitution?

The acquisition of which territory in 1803 doubled the size of the United States?