This essay explores the restrictions on civil liberties in the United States during wartime, emphasizing the delicate balance between national security and individual freedoms. It examines how events like World War I, World War II, and the post-9/11 era have led to limitations on rights such as freedom of speech and the right to a fair trial. The essay discusses key legal cases, including Schenck v. United States and Korematsu v. United States, to illustrate the Supreme Court's interpretations and the government's actions in restricting civil liberties. Furthermore, the essay analyzes the impact of legislation like the Espionage Act and the US Patriot Act, and their effects on individual rights. The essay argues that while restrictions on civil liberties are sometimes necessary for the protection of the general population during wartime, they must be carefully considered to avoid infringing on fundamental rights.