Internment camps, often synonymous with detention facilities, detainment centers, or prison camps, refer to confinement buildings used to hold people deemed dangerous or undesirable to a government or ruling authority. These camps are often used to detain people who have been accused of civil disobedience, such as protesters, or those who are considered a threat to national security. Other synonyms for internment camps include concentration camps, internment centers, or gulags. These facilities are typically marked by their oppressive conditions, lack of privacy, and restricted communications with the outside world. Internment camps have been used throughout history, from the detention of Japanese Americans during World War II to the current immigration detention centers holding undocumented immigrants in the United States and around the world.