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?


Which treaty formally ended the American Revolutionary War and recognized the independence of the United States?