Which of the following events is considered a domestic conflict during the early American republic?

The Whiskey Rebellion is considered a domestic conflict during the early American republic because it arose from within the United States over issues related to federal authority and taxation. Specifically, it was a violent tax protest that occurred from 1791 to 1794, primarily in western Pennsylvania, where farmers resisted the federal excise tax on whiskey, which they viewed as unfair. This rebellion exemplified the tensions between rural citizens and the federal government, highlighting issues of governance, representation, and the exercise of federal power in domestic affairs.

In contrast, the Civil War was a larger-scale conflict involving secession and the division of the nation, whereas the War of 1812 was fought between the United States and the British Empire, primarily over maritime rights and expansionism. The Korean War was an international conflict involving North and South Korea, along with other nations, and therefore does not fit as a domestic conflict. Thus, the Whiskey Rebellion best represents a conflict that arose from internal divisions within the early American political landscape.